Like someone below said bots are more complicated than just clicking on what brings them money.
In order to be not detected as bots, they need to behave like humans. Hence, they like and visit websites that they have no special interest in. Think of it this way: 50% of what they click is just something random, other 50% is what their masters programmed them to do.
This really doesn't have to do anything with Facebook. There are companies in Russia and India that sell likes, follows, etc. These bots then have to fake their identity and as a result they like stuff that you pay for as Facebook advertiser. I am sure Facebook does something to mitigate this and block the bots but it's a never-ending game for them and those who sell fake like/follows/etc.
In order to be not detected as bots, they need to behave like humans. Hence, they like and visit websites that they have no special interest in. Think of it this way: 50% of what they click is just something random, other 50% is what their masters programmed them to do.
This really doesn't have to do anything with Facebook. There are companies in Russia and India that sell likes, follows, etc. These bots then have to fake their identity and as a result they like stuff that you pay for as Facebook advertiser. I am sure Facebook does something to mitigate this and block the bots but it's a never-ending game for them and those who sell fake like/follows/etc.