How long do you think Reddit would have kept Apollo ad-free? That would cost them whatever Apollo cost and have the same result. The value proposition of Apollo is that Reddit doesn't own it. They already have a client. It sucks. Why would this be better?
Reddit already offers an ad-free experience for $50 a year with reddit premium. Throw in Apollo with that premium, and you start earning $50 a year from a bunch of users who were previously generating zero revenue through ad views.
Yes, that makes sense. But do you think Reddit would actually do that? Apollo has a better UX. Reddit has proven they don’t want to build a good UX. If they bought Apollo they would only ruin it.