Yes it uses google adsense, the strange thing is, it shows ads for things that I have not searched for on google, and yet are relevant. A bit scary, like its reading my mind
I've also found the Google AdSense to be perilously inaccurate. Not one time have I shown interest in getting a Mother's school loan.
That's statistics. If they found that websites about flowers have 1.2% more visitors that like baseball than the global average, then you'll get more baseball ads after visiting a flowery website. Even if you don't even know how baseball works.
I get ads for Zoosk and Chinese and Russian dating sites, and I'm not allowed on these sites, as of my age...