When you're getting paid for something in a token, the rule is this:
If for the said action a normal world nobody would pay you a cent, then the amount of tokens you will receive for that "work" of yours will also be worth less than a cent.
Simple economics!
Nobody is interested in paying you to walk as you don't generate any revenue.
Nobody is interested in you playing games as long as you don't pay first to play!
That is exactly true! And maybe, that's the reason why most of these projects failed to go mainstream because how can they earn money out of this project? How many projects have tried this "move-to-earn" model, and yet, you can't see them in popular trading platforms. Most even didn't get the chance to be listed in the exchange. The sustenance of this niche seems to be quite challenging as they need to find a way how to generate their income such as getting ads or sponsorships from related companies.
But don't know how STEPN is doing in the market, one move-to-earn model that I know so far which is still alive, at least their app and website.