I think the issue here is that game shows don't really travel. Well - the formats do, but they require localisation.
While "Bullsh!t the Game Show" may be *available* on Netflix in the UK, whether viewers are actually watching it is another question altogether. Howie Mandel may be a massively known host in the US, but over here I suspect a handful of older viewers would remember him from St Elsewhere and that's about it. Whereas the newly announced "Cheat" has Danny Dyer and Ellie Taylor as hosts. Dyer has been in one of our big soaps for years (and presents another gameshow on BBC1 called "The Wall"), while Taylor is a known comic. This is squarely aimed at a UK audience and I doubt many viewers in the US will be tuning in.
I see in the new schedules that NBC has a version of "The Wheel" - and despite using the same British host, comedian Michael McIntyre, NBC obviously isn't going to show the BBC episodes. I guess when game shows need to appeal to local audiences, they're thinking about how viewers determine which contestant they root for. Is it the one from your city/town/state/wherever? The one who's brief life-history closest reflects yours? The one you find most attractive? All of that is easier if the show is localised.
As for two game shows with similar-ish premises at the same time? Think about how many competitive singing shows there are at any point. Often on the same network. In any case, these shows sound more distinct from each other than most of CBS's primetime lineup!
Adam