Banks were doing it to the porn folks back when porn took off(in the late 90s/early 21st), and average idiots were trying to get in that game. They were shutting their accounts down for basic 'moral turpitude', or near there.

They kept this up, until the few major 'tube' sites, came in, basically bankrupted an entire industry into, or I should say back into a couple conglomerates.

This is a single example that I know of. I started paying attention to stuff like this, as banks go hand in hand with the IRS. Something I didn't know about the IRS, is how they've got a multitude of special profession income taxes; above, and beyond the average job. It really kinda made my head spin to know there are groups of people out there, that due to their jobs, and perhaps lack of numbers to make their plight known, are forced to pay extra.... Just seems insane to me.