content: Some coins may stick around--and they may or may not be in existence today (so better implementations of what's out there), but ultimately if you look at a lot of the ICO's that have taken place they've either been intentional scams from the start or have gone belly-up and run off with everyone's money. Ultimately I don't see their decision to ban the ICO ads as a bad decision. People getting 419 scammed through their ad network would make them look bad, and so do ICO scams. I think it's reasonable to protect their image and users.