Like I said, above I get that.
But seeing as +90% of people who get the main software don't even install it, and probably 99% of the rest uninstall it almost immedently, I don't see how much money it could really be making. Even if you do install it, and leave it on, are you really gonna click a signifigant amount of ads it shows, if any?
The point about advertising isn't that it makes you purchase it straight away.
Think about adverts on TV. You're not likely to see one and go "Oh, that looks good, I'll go and buy that right now".
Instead, you see it, remember it (for whatever reason), and later on down the line, you might find yourself needing a product, and your mind jumps to the advert you can remember.
It might not seem like adverts make you want to get lots immediately, nor that they can even convince a lot of people to purchase your products, but they do.
And if you can sneak them onto peoples computers, or into their lives via other means, then you might as well if it's going to earn you some more money in the long run.
Hence the reason companies will pay other companies to advertise their stuff on them, even if it's only a crappy little download attatched to the download of another program.
