I use it. Not a scam. But I prefer reviews here and TER. Compared to TER, Rubmaps search sucks if you’re looking by type of girl. Will match any girl who has ever been reviewed at a place and you have to go manually open each review to see if she’s hot, and if she’s the one that matches your search.
Compared to here, this has way better discussions and you can tell who’s new and trending here, with more in depth reviews. Rubmaps is more of a directory.