TL;DR:  Coinmarketcap likely does not control the ads on their site.  They're based on your Google profile and site content.

This is how advertising on Coinmarketcap works:

Coinmarketcap says to Google, hey I got a guy here about to browse this page, and we have 4 ad slots available on the page.

So Google goes, ok, you're a cryptocurrency site, here's 4 ads that we think your visitors are likely to click on.  Oh wait, this guy, AGM76 that's about to read that page, we know he's been to other sites, sites like bitpetite.  So let's serve him some related ads.

Every person who comes to Coinmarketcap sees ads tailored on what the site is about, and also to match whatever Google knows about you.  So if you go to a lot of crypto "lending" sites, Google will serve you ads for those sites, or sites like that.  Most people will go to Coinmarketcap and never see an ad for a crooked site.   

So if you're trying to insinuate anything and make connections between advertising that's served uniquely to you and some grander scheme, you're going to need to come up with some solid proof.