Great way to lose all of the traffic. This would require two things:

1. Accounts, which is automatic friction. Whether that’s people who have no account and only come to browse, whether that’s people having to make a second account or choose to be horny on main, this is definitely going to cause some user loss.
2. Willingness to pay reddit for porn, which like, no. They’d be better off giving paid user pages and simply taking a cut so OnlyFans creators can treat reddit similarly. I don’t think many people are gonna want to pay for what amounts to teasers for other paid options.

Additionally, this would mean reddit is acknowledging the porn on their site and taking responsibility for it by profiting off of it. Therefore, because reddit is an American company, this will kill off their audience in Texas and Oklahoma where, effectively, American-hosted porn websites are banned.