These banks are too big to fail and get bail outs funded by taxpayers (and SMEs), and yet SMEs are too small to matter and entire livelihoods can be thrown to ruins based on ahat is often a very subjective and often erroneous risk process. I understand banks have to comply with laws and often complex risks but i doubt they would shutdown accounts of companies worth over $1B unless youre violating some serious laws and even then it would probably be done with a lot more caution due to risk of law suit.

I doubt Mercury can do much more as arent they just a vrand on top of a bank? Like Heroku vs AWS.