The best case is it is a Ponzi scheme, but you are in the early innings, and you will get your principal plus interest back before the whole thing collapses.  Remember, even with Madoff, some early investors actually made a lot of profit (though they were eventually clawed-back)

It's possible a user exportet a single key from his electrum wallet and used it in mycelium (for example). It could get compromised by the bad RNG in android and compromise all keys of the wallet.

I just don't ever export private keys from them.

If you were are one of the subpoena recipients mentioned here and are marveling at the multitude of demands and short deadline and are contemplating not responding:  That would probably be a very bad idea. You should seek legal council immediately. relocate your self and your business outside the US and never look back.

You forgot #3, depleted uranium is less radioactive than the dirt you find it in, and of course, #4, "mass destruction" doesn't mean "reporters don't understand it", it has a specific meaning involving large areas.

27.25% for 90 day CDs.

Of course it must work multiple times - just like PGP/RSA has been working, ever since it was invented.
And nobody says that you using the same PGP key twice "should be considered negligent" - it would just defeat the purpose of a digital signature

I guess, or understand, that 'receive' addresses can be safely used more than once?

Consider a group of 10,000 investment managers whose investment success is comparable to that of a fair coin toss. Each manager has a 50-50 chance of making or losing 10% in any year.  At the end of each year the losing managers are thrown out of the game.

After the first year 5,000 managers have made money and the rest have bailed out.  After seven years there will still be 78 managers who have made money continuously, purely on the basis of random chance. Their portfolios are up a total of almost 95% after 7 years.  If these folks then go off and start their own hedge funds, there’s no way to know that their apparent genius was merely luck, and they’ll probably attract a lot of investors.

Now suppose that instead of giving the managers an even chance of making or losing money, we start with a pool of 10,000 relatively incompetent managers. These individuals are more likely to lose money than to make it: they each have a 45% chance of making a profit and a 55% chance of losing money.  At the end there are still 37 fund managers who have made 10% a year for seven years. Even though this group is more likely to lose money than to make it, a few will still run up impressive gains and develop reputations as hot managers.

This demonstrates that if there are lots of fund managers, a certain number of them can look like geniuses when in fact they are merely “lucky,” even if, in reality, they’re moderately incompetent! As Taleb notes, knowing that a manager has an extraordinary investment track records doesn’t tell you anything: “without knowing how many managers out there have tried and failed, we will not be able to assess the validity of the track record.” If the manager population were small, a good track record would be impressive.  But in fact, if you count all the money managers in the U.S. alone, 10,000 underestimates the reality.

But that has nothing to do with deterministic wallets. Non deterministic wallets do not require address re-use.

Not really.  This is a problem with a specific implementation of a specific secure random number generator (android).

There's also I2P mail, which has a gateway out to the internet at large.

I'm as jaded as the next cybercat, but while the term mlm is notorious for scams, in this case it may not be because they are targetting experienced mlm folks about something they've never heard of.

Many thousands of people make an excellent living via multi-level marketing.