I doubt it ill be a complete scam, but courses like this, no matter what topic they're on, tend to be pretty useless. Even if you do these courses, you'll probably be unlikely to find somebody who will employ you.
This depends though on how up-to-date what they teach is, an employer will want somebody with experience of the kind of technology they're using
Personally, I think with there being a lot of these learn to be a game creator courses around, competition will be tight for jobs, and companies may just choose to employ elsewhere