I think the ads on mylot can read my mind  

huh, I didnt know that, well thanks for shining some light on the matter for me, I always thought that the ads came up according to what the discussion was about. I didnt know they went that far in depth

I think that the tags are also used and it's likely that certain keywords in discussions trigger ads, too, but I have certainly noticed that the banner at the top is controlled by your interests. It is probably country-specific, too, either based on the country you entered in your profile or on your IP address. Many ads use your IP address to deliver appropriate ads.

im not sure exactly what you're asking, if you are asking can mylot generate revenue thats a big yes, if your asking how can they, its because of all of the ads you see on this site makes them money, and since they get a nice income off of it they decided they'd be extra generous and give us users a cut as well, it might not seem like much but hey, look at all the sites you might go to that arent nice enough to share some revenue with you