I've done both - I've built an arbitrage bot and an AI that finds trading patterns (genetic approach).
The arbitrage bot isn't efficient because the markets are moving so fast that you don't get the prices that you want - even if your sever is directly connected to the exchange server. It doesn't matter how fast your algorithm is - it's physically impossible (talking about bitfinex). You can maybe earn something on slower markets but it's less lucrative and it takes a lot of work to do and event after that it isn't guarateed to work.
It can also be that you have calculated that you will earn a lot of money but after a few months, when the project is finished it's 1/10 of that because numbers like trading volume have changed significantly. What, maybe, could work are HFT strategies implementing a mix of insurance Mathematics and Ergodic theory which is a bit like trying to beat roulette at the casino but this takes a LOT of work and time.
Cross exchange arbitrage can end up being a huge problem because sometimes coins are locked for deposit and withdrawal and then people will pump them usually. Unexpected exchange behaviour in general is a problem. And I haven't even started to talk about all the numbers like fake volume that a lot of exchanges are displaying (like 95% fake volume).

The AI is funny - the more complex your trading strategy becomes, based on the data you feed the bot with, the less it will work in the future. It's because you have the too opposites "General Rule" vs "Specific rule". The more specific a rule is the less it will work in general and the more general a rule is the less it will work in a specific case. So what the Bot wants to find is a (relativly) simple, general rule. A rule like that does not exist. By saying "does not exist" I mean that there is no simple, general rule that would have made you more money than just buying and holding bitcoin (if you analyze all bitcoin trading data on Bitstamp from 2015 until now)

Yes it's working exactly like this. Insert your BTC address, upload the file, paste the link, done.


I also think, because of the amount of services out there, that the simplest and most user friendly solution will have the best chance to be adopted. The key is to reduce all entry barriers as much as possible.
You can upload any file now, it's implemented 

There will be no showcasing of all files on the site. You will have to share the link somewhere if you want to sell the file.

Based on the feedback here I've just released an update. You are now able to upload all file formats, the only restriction is that a maximum of 4 chars is allowed in the filename extension.

I think that zipping on the server is an optimisation that is not yet required but when more people are using the service it will be a nice thing to have. Now I'd rather focus on usability issues, and as you said, it seems to be a good idea to allow more filetypes since the first thing that everybody seems to complain about is the zip upload restriction. I didn't know that I could define the file download behaviour in the header so that will be the next thing I will take a look into, thanks for the ideas.

There will be no way to browse the files on the page itself except your own files using the command tool and all files will be named randomly. This is intentional because I don't want bots and people to be able to browse copyrighted files by searching for strings like *gamename* on my site. This means that you will have to copy the link of the uploaded file and post it somwehere else and it also means that you will have to manage yourself how a preview of the data you want to sell looks like.
You can upload cracked software and potentially illegal and questionable content anywhere on the internet, I will handle it accordingly which means that it will be removed. If many people are using the service a blacklist (monitoring and filtering system) will be implemented.



Thanks buddy, I'll try it and release an update when it works

Thanks! It needs a lot of marketing indeed. And not many people know how to use lightning yet.

Files that contain "warez" will be removed when reported.

Hi, I have limited the upload to .zip files because I noticed that f.e. mp3 files will, sometimes, depending on the browser, get played directly inside the browser window wich makes it difficult to ensure that the file was actually downloaded by the user and not just cashed in the browser. It's there to reduce the risk for the user.
Currently I can not accept bech32 addresses because, as far as I know you, you can't sign messages with them and because of that you can't execute commands on my site because you can't prove that you are the owner of the address that has uploaded the file.

Selly looks interesting but the first thing you have to do is to make an account... I don't like accounts and I also don't like cookies. There is nothing like that on my page. You don't need an account to sell a file.
A file will be deleted if it hasn't been downloaded for more than 4 weeks. It's mentioned in the "?" on the upload page.

There is a fee of ~1$ for the seller if he wants to withdraw his coins and a ~0.3$ fee for the buyer per GB downloaded.

Hi, yes, I'm currenty only allowing zip files. If users want to upload more filetypes I can enable that later, depending on what people want.

Hi, I've built https://wesellfiles.com, it's a pay per download file market, built on Bitcoin and the Lightning Network. It's a place where everyone can earn coins by selling files.
My intention was to make it as easy as possible for everyone to sell files and this is the result! Files are bought using the Lightning Network, the seller can withdraw his funds on-chain. If you have any questions let me know.
Enjoy!