It seems Twitter is turning off ads for it's highest engaging users. Matt Gemmell has doubts about the move.

I’d pay for Twitter if I could. It has real value for me, both socially and as a promotional tool. This latest move only increases my uncertainty about its future.

— Tiered social media by Matt Gemmell

I agree with Matt.

What Twitter seem to be forgetting is that it's the masses of users that make up the following numbers for all these highest engaging users. What's their reward?