I presume because it is all a marketing ploy so people believe in their product. Once you get good you don't really lose it. Think of it like a boxer, they have comebacks all the time and it takes such little time to get back into it. I can't really speak from experience but that's what I assume is the case.

In a few weeks he'll suddenly have 5 dates a week from Russian runway models. And all the fanboys will be buying products.

Yeah that's a fair enough assumption & it could well be true but that doesn't mean it's definitely the case.