I know it most probably won't happen, but maybe if the ads reach a certain level of annoyance, perhaps "normal" people might start searching for WhatsApp alternatives.

They have to make money somehow!

Also, they can get the gist of conversations you are in, and create a list of tags that can be submitted to the ad engine. So with limited privacy concerns. If you talk about diapers, you'll get a Pampers ad.

Anyone else excited about this? /s