WRT Patreon, I'm 99% sure that this is the reason they didn't propose something like a "balance card" where patrons just give them $X and both pledges and fees get deducted from that -- since that money's being held and then paid to someone else, it could end up being too close to a "money transmission service." (I'd thought there was a non-zero chance that this was a motivating factor in this change to start with, actually; coming so soon after a huge investment round sure makes it seem like there was a condition to that investment that spurred this change. Christie Koehler wrote a good post about that on her blog, although I don't have the link handy.)