The HN comments are pretty unanimous on wanting to pay this amount to remove ads, not for more features. The problem with that is that an active US user is already producing more as revenue than that from ads. (40M US DAU, 500M US advertising revenue per quarter -> $4/month). Add to that the problem that for subscriptions they end up paying app store fees, subscriptions to remove ads just can't work. They'd need to price it at like $10/month, but it seems obvious few people would pay that.

This does feel somehow absurd, given how ineffective one would expect Twitter ads to be, but might be illustrative of the problems with paying to remove ads.