$2.50/user/month for Apollo usage is considerably less than the $6/user/month charged by Reddit to users directly for an ad-free website experience.
Is $2.50/month an unreasonable price for an ad-free Reddit experience? If that’s how much Reddit is being paid for advertising per Reddit user, then how many Reddit users will voluntarily pay that to use ad-free third-party apps?
This is more likely to kill Reddit Premium, than to kill paid third-party apps. Apollo is a better experience than Reddit Premium, and at a theoretical $2.50/month versus the known $6/month, would save me $42/year over Reddit premium. Sign me up.