Activity is updated every hour for all users.
As I said above, if your activity doesn't change despite making post, that doesn't mean your activity isn't updated.

Your activity equals minimum (post count, 14*n), in which n is the number of two-week activity periods in which you have made post.
As long as 14*n is lower than your post count, your activity equals 14*n and that's why your activity doesn't increase with making a new post.

Again, if your activity doesn't change, that's because it shouldn't change. That doesn't mean your activity isn't updated.

It seems that, there's something I don't understand here.
BIP39 seed phrase is created using a known algorithm and anyone can make any change to the algorithm and the wordlist. Electrum is also open-source and and anyone can change the source code.
I can use my own wordlist in electrum as I can use my own wordlist when creating a BIP39 seed phrase.
Are you saying the possibility of having your own wordlist in electrum is an advantage while that's a disadvantage in BIP39?


Doesn't BIP39 also have its standard wordlists for some languages?
If I generate a non-english BIP39 seed phrase using these standard wordlists and not my invented wordlist, there shouldn't be any problem.

That's the same in electrum. If I use the standard wordlist, I will be able to recover my wallet easily. But in the case I use a modified version of wordlist, I won't be able to recover my wallet if I lose the modified version of wordlist.

Is there anything I am missing?

Activity is updated every hour, not only on Wednesdays. (Click here to see the post made by theymos.)
If you see your activity doesn't change, that doesn't mean it's not updated. If your activity doesn't change, that's because it shouldn't change.

The balance shown in that column is the total balance of your wallet after the transaction and it includes your change addresses as well. The balance displayed at bottom of the window is also correct.
You probably made a mistake in your calculations.

For generating your addresses, you need all the master public keys.
Assuming you have a 3 of 5 multi-signature wallet, you need three seed phrases and the two master public keys that are derived from the two other seed phrases.
If you have three seed phrases and nothing else, you won't be able to recover the wallet.

A public key is different from address.
The public key is derived from the private key and the address is derived from the public key. What you share with others to receive bitcoin is your address, not your public key. 

Private key is used for spending the coins. As the name suggests, a private key should be kept secret. Any who has access to your private key can steal your fund.
A public key can be shared publicly. Whenever you a make bitcoin tranaction, your reveal your public key.


If a wallet is open-source, it means that the source code is available to the public and anyone is able to check the code to see how the wallet is working.
If a wallet is close-source, there is no way to know how the keys are generated. You should avoid any close-source wallet.

That's not a new feature.
Click here and see a post made in 2015, in which a user was talking about quick edit button.

Edit:
Click here. The quick edit button was available even in 2011.

That's accurate.
According to the old post made by theymos, a new activity period starts when the remainder of division of the UNIX time to 1210000 equals to zero. This means that, each activity period is exactly 1210000 seconds which is 14 days, 6 minutes and 40 seconds.

Prediction 1: $20,880.00
bech32 address: bc1q06h9jgf2ccurtt0d07shkttjpdw5zdfkyh4l8j

It's a good idea to use a multi-signature wallet if you worry about your seed phrase being stolen.
Just note that if you lose the seed phrase A, seed phrases B and C won't be enough for recovering the wallet. You will need the master public key derived from the seed phrase A as well.

Take note that the seed phrase generated by electrum can't be imported to sparrow wallet directly. Electrum generates the seed phrase using its own algorithm and you can only import BIP39 seed phrase in sparrow.
If you want to import your electrum wallet to sparrow, you should import your wallet file.

You are right, unless you have many small inputs and you want to consolidate them when you can make transaction with low fee.
Note that with consolidating your inputs, you link them together and you may hurt your privacy.

All your private keys can be derived from your seed phrase and that's all you need.

Yes.

As I said, there is no problem with reusing addresses, when it comes to your security.


Electrum generates numerous receiving addresses and change addresses for you and you can see them on "Addresses" tab. (If you don't see "Addresses" tab, click on "View" at top of the window and select "Show addresses".
Every time you request a new address on "Receive" tab, electrum gives you a new address which is one of the receiving addresses shows on "Addresses" tab.

You can use any bitcoin address as many times as you want without any security issue.
As I already said, it's recommended to not reuse addresses due to privacy reasons.

If you give the same address to several people, any of those people can check your other transactions. Take note that all bitcoin transactions are public.

Due to privacy reasons, it's always recommended to not reuse addresses.

Assume that there is no change address in electrum and your receiving addresses are used for receiving the changes.
You have fund in address A and you make a transaction. Electrum uses address B as the change address while you have already given the address B to someone to receive a payment.
What will happen? Address B will be reused and that's not recommended.

You have the change addresses, so that you don't use them for receiving fund and you can protect your privacy.

Your understanding is not correct.
Given your previous posts, I assume you are using electrum.
Electrum allow you to spend unconfirmed coins whether they are in change addresses or receiving addresses. Just make sure "Spend only confirmed coins" is unchecked.

Where did the 0.0001 BTC come from?
The fee rate is set the by the user and the required fee rate depends on how fast you want your transaction to be confirmed and how congested the network is.
Also, the transaction fee doesn't depend on the amount of bitcoin you send at all.

It may worth mentioning that, the chance of winning the $15,000 Rolex is even lower.
Every time you spin the wheel of fortune, a random 8 digit hexadecimal number is calculated and is converted to a decimal number. That's divided by 4.294967295 and then rounded down to the nearest whole number.

The only 8 digit hexadecimal number that can give you 1 billion is FFFFFFFF. This means that the chance of winning the $15,000 Rolex is 1 in 4,294,967,295.

Not necessarily true.
Yesterday was the last day of a two-week activity period. Assume that you made your first post yesterday. If you post 27 posts today, you can have 28 activity while you registered just yesterday.


The same activity periods are used for all users and the current one started yesterday.