"Nothing" is a perfectly valid answer, but I'd also be interested in creative ideas.
The context for this is that I was involved with Trolley Problem Memes for about 1.5 years, and am still on good terms with the current FB page admins, who are all on board with making the page be more EA-useful.
I feel pretty disappointed about the lack of useful activities that has come out of the page so far,* and vaguely feel like more can be done, given the relatively large reach. I'd be interested in different people's theories of change, whether as "landing page for getting more directed ads/Digital Marketing to EA projects and fellowships", "broadly making consequentialism and longtermism 'in the water supply'", "training the admins for doing other impactful digital marketing projects later"or something else.
I would be especially excited for answers where someone proposes a plan and also has some excitement about personally volunteering to implement such a plan for the page.
Note that the page is less active than it used to be, but this can potentially change.
* So far: we had an AMF fundraiser which raised maybe 3k, we sold some merchandise worth maybe 1k, we tried to do some vegan outreach with ~0 effect, we tried plugging 80,000 Hours to basically ~0 effect. Some time after I stopped being involved, ~2 people have reached out to me saying that the page was involved in them being more interested in EA (though I'm not sure how much credit should go to the page), so it's not nothing, but the ROI of the time spent is pretty bad.