What would you suggest if your OS project was bound to MIT and there's no way of introducing a commercial license?

heatmap.js (my pet project) unfortunately has those constraints and I'm currently trying a mixed model of high priced premium support and donations.

Donations got me almost nothing, high priced premium support got me a few hundred dollars within a few weeks after I introduced it- more than I made the last 4 years with donations.

I'm also trying binpress as a secondary channel to sell support. will see how it performs over time, but binpress looks promising so far