Put another way: people "get" this software for free, and then pay other people to get rid of it.
And then other scuzzy companies have built a niche industry around the "PC tune-up", prompted by stuff like this software, charging a lot of money to people who don't know better. And, often all these companies do is run software that has been specifically designed to remove junk software.
A lot of this niche is exploitative, taking advantage of people who don't know better, and it's all supported by the bundling of this crap. That goes well beyond "opinion"; "opinion" might be, "Facebook is crap", but there isn't an entire market built around people paying other people to shut down Facebook accounts. Users aren't "choosing" to install these things any more than someone might "choose" to step on a pile of doggy doo in the park.
IM really isn't your responsibility though, so thanks for getting them to flush out the OSS-wrapped stuff at least.