What's up with all those spam bots lately in the youtube comment section?

For a few months now, these bot comments seem to be appearing more and more frequently. Always with a profile picture of a model making innuendos, accompanied by a generic comment praising the video and practically always adding some kind of emoji. Is this some new scam or is it just the current generation of spambots as per usual?

Not that I'm particularly interested in the YouTube comments, but I occasionally check them out and noticed this.