I wonder if you've seen this post going around Tumblr, and if you'd care to share some context for why AO3 has the "no advertising" rule:

http://whalehuntingboyfriends.tumblr.com/post/150945654504/psa-dont-mention-commissionspatreon-on-ao3

OP seems to be 20 and taking the news impressively well; you sort of get used to seeing people throw fits over stuff like this, so it's nice to see someone go "oh, okay, I'll pass that on" without trying to start a revolution over their Patreon links. I was tempted to reply myself, but I'd probably stick my foot in it. :P