Of course, this will require way more resources from twitter in bandwidth which I do not know if twitter Blue users alone can pay for it.
> If you can simply have one balance on Twitter that can simply go positive or a negative, and when it goes positive, the interest rate is better than what you could receive elsewhere, and when it goes negative, the interest rate is lower than what you see elsewhere, now you have a much simpler system.
Interesting choice of direction...
That's the uninteresting part about payments though.
It's like saying "Well, writing is just putting words to page, so since I've written a dictionary and a phone catalogue, I'm qualified to write a novel".
The important part and the really difficult domain part, is all the regulations, money handling rules, everything from exchange rates to returns, and so on...