[jakub_g]

Durov recently announced they will smart monetizing through ads, but only in "channels" of people with huge subscriber count (which generates a lot of costs). Channels are 1:N public broadcasts, a bit like Twitter.

[hanniabu]

That's how it all starts. And how will they know what ads to show you? By mining your conversations.

[daredevil_kohai]

No. He confirmed that the ads will be generic. Not targeted to people based on their data.