I wonder if the next challenge for them is the strong representation from r/atheism on their frontdoor? I say that as a very irreligious person who guesses that discovering their new selves is exciting for (I imagine, predominantly) American youth. But some pretty bland ra-ra makes it through and I can see that being off-putting for religious types and "this again?!" for those for whom a lack of belief is the default rather than something new and outrageous within their community.
Yes, I know people can create an account to customise their experience, but some fair percentage of their traffic is going to come from people not interested in taking their involvement to that level.