4chan may not be a good example. A good proportion of the user base uses ad-blockers, is young and has little disposable income, and generally just pirates everything anyway. Plus they are extremely fickle, changing loyalty at the drop of a hat, which tends to be quite often with all the drama that goes on over there.
DeviantArt seems to have done okay at helping artists get paid. A lot of them have Patreon accounts now and do commissions. It's the site itself that is finding it hard to get a share of that income. What they really need is their own donation/payment system, i.e. replace Patreon for their artists and cream off a few percent to pay for the site. Setting up such a service is not trivial, but maybe Wix sees an opportunity.