I don't think that's anything new. :(
I've given stuff away for free with a disclaimer that it has some defect/algae on it/etc. just to see it advertised again (for money) and no disclaimer
Or people buy up stuff with a flaw (parasites, etc.) and then resell it without mentioning the flaw so regardless of how honest the initial owner was, endangering other people's livestock.
That actually bothers me more than the money making aspect.

PS: I have no idea who you are talking about so I am definitely not pointing fingers at anybody ;)