Probably not, considering it says "Advertised sites are not endorsed by the Bitcoin Forum. They may be unsafe, untustworthy, or illegal in your jurisdiction."
It also might be a redirect because the original site is dead, it popped up the same for me too.
Yes we all know sometimes the ads are scams, caveat emptor and all that, but I'm not sure if theymos means to be showing this particular one.
https://twitter.com/magnr/with_replies?lang=entheir twitter has been quiet for 6 weeks and their site looks like they threw in the towel, so why advertise here now?
Did check that, neither seem to be exchanges...