Like
@Andysol noted in his Reddit comment, it appears Chase is a year behind in going after perceived misuse, so we may not know if Chase considers whatever we’re doing misuse for another year. Even then (and I haven't seen the letters), it seems Chase is only issuing warnings for now, not clawing back points or shutting down accounts.
What I don’t like about the Chase self-support and cross-support method — and I commented about this in the DISchurners thread — is that it’s obviously a “hack,” something stumbled upon by the churning community, and not developed, intended, or supported by Chase. By comparison, Amex's universal cross-support was clearly designed by Amex as a new feature (and there's some ambiguity whether self-support was intended).
This aside, DPs that self- or cross-support using this method may or may not track seems to me like risking a waste of a lot of support clicks. I'd rather use someone else's official support link and have confidence my click will track and the support points will be awarded, even to someone else, than potentially waste a click on myself. This is somewhat analogous to why I’ll choose to use certain shopping portals over others, even if the payout is lower but I know it’ll track vs. a higher potential payout but risk that it won’t track. And then I may not want to follow up for the missing purchase because I might’ve used a credit card or promo code that may or may not be supported. Getting Chase to credit you for missing support points is difficult enough when the click is legitimate. I don’t think it’d be a good idea for anyone to ask Chase to credit them for a support click that didn’t track using this method. (And I hope no one is stupid enough to try.) But then that’s a wasted click, and the bank wins.