[jljljl]

A few thoughts:

1. I'm not sure that an account that heavily browses twitter is zero value to advertisers. If anything, those are more engaged users with Twitter, _and_ Twitter should have more data and thus better targeting for that user.

2. The marginal efficiency of not showing an ad to a saturated user is probably offset by the reduced potential audience for your ad. Once you've seen 600 tweets, you can't use Twitter or view any more ads. That can shrink the daily audience significantly.

3. Users now need an account to view _any_ tweets. This further reduces the reach/audience for Twitter ads. If Twitter ads already have low CTR or referrals, and now their potential reach is cut, then they have no value.

I have blocked ads most places, but I use Twitter in ad-supported mode + receive ads through the app. I'm a good example of a user they'd be advertising to, and now I can't use it.