@antlerboy My favourite at the moment is the way NordVPN keeps spamming me with offers on a way to "Get rid of unwanted robocalls". Some sort of thing that purports to take my data off commercial databases. I have significant doubts about whether such a thing is either possible in any meaningful way or would reduce robocalls if achieved.
The thing is, I don't get very many robocalls. Almost none, in fact. What I do get a lot of is spam. Which they're adding to. They're very persistent about it. The irony appears to be lost on them, even after I pointed it out last time they had a drive for this.