These things are different though, we must admit. Imgur used to be much bigger, but today hardly pulls the same audience volume that Reddit or Twitter do, for instance. I don't think Imgur could get away with API pricing like Twitter is, and Reddit will soon be.
> I expect that the reddit premium price is far above the ad revenue from a mildly engaged user.
Given the number of ads you see while browsing via the official app, I would peg it around $2 per user per month (which mostly aligns with my previous statements and estimates, as well as with API pricing), for someone that uses Reddit for 1-2 hours daily. I suspect, without evidence and can be wrong, that 1-2 hours daily is typical for a mildly engaged Reddit user.
Apollo doesn't need to drop free users - they need to get revenue from them. If not directly, then via ads. Although that seems antithetical to what Apollo was trying to create... but reality has come knocking.
I expect that the reddit premium price is far above the ad revenue from a mildly engaged user.