I see posts about ads on steemit from time to time, but I have yet to experience them - I just use Brave browser. I don't get why they aren't selling advertising to steemians directly, though. They could keep 100% of the profit but instead are going with Google and only getting a small percentage. I know they made a quick decision when the funds were tight a few months ago, but people will surely pay steemit Inc to advertise on it directly. They could also put Google ads on the feed pages and ads from steemit users on post pages diversifying their potential income. Just a thought.