Yes. It was created by Slash. Whether it's still owned by him is another matter, but it's a strong guess that he is because he's known to refuse selling his petsites unless he gets ludicrous offers. He has been on record saying he'll only sell Aywas for a million and nothing less to several of his ex artists.

Slash, to my knowledge, has only created Aywas, Furvilla, and Felisfire. He's a huge nightmare and you're correct in that he just fucks off and leaves everyone else to do his work for him for free or subpar pay. All he does is finances behind the scenes to pay for site upkeep and maybe guide the site's progression but he leaves literally everything else in his unpaid administration's hands, and is more than happy to throw his current administration under the bus instead of taking actual ownership. He's even faster to do this if a site is no longer making him money.

This is how Slash ALWAYS has been.