i dont really understand why they do it? do they make it up just to have something to brag about, is that all there is to it?
views, polyglot gets those sweet clickbait views
also the ones like ikenna trying to make money out of it
nice OP though! as a retard whos been trying to learn a second language i see a lot of these people around on youtube when trying to find legit recourses. It's easy to get sucked in, but in the end you just have to accept theres no quick way to learning anything, especially if you're from a country that is pretty much just native english speaking.
within the japanese learning community there was drama semi recently with Matt vs Japan, who can legitimately speak japanese and is pretty popular with people for his methods
until he suddenly decided to release a super special course that costed $100s of dollars claiming it would get you fluent, which was bizarre as all his previous methods his whole youtube was built around were completely free. Kinda depressing, cause I liked the guy and his stuff helped me and a lot of people I know who are also learning use his methods, but this whole recent shit makes me not trust him as much
I say "his methods" but a lot of it is just taking ideas from other people and passing it off as his own ideas

but still, a lot of people I know learn japanese exclusively via the
refold method. Of course, they have a patreon and they also
sell flashcard packs for different languages for like $20 claiming they're all you need for fluency. Whilst they may be helpful,
you can absolutely get this kind of content for free.