What is Move-to-Earn (e.g., STEPN)?

Help me out here. I am completely stuck trying to figure out exactly what is Move-to-Earn (e.g., STEPN)?

I jog a solid 15 miles weekly—mostly dodging stray dogs and rogue sprinklers—so getting paid for that sweat equity sounds wildly appealing. Last Tuesday, a buddy at the gym wouldn't shut up about minting digital sneakers. So, naturally, I fell down the rabbit hole.

It's a total head-scratcher.

I get the basic premise of slapping a smartphone pedometer onto a decentralized ledger. But practically speaking, what is Move-to-Earn (e.g., STEPN)? Like, how does the actual cash flow work without immediately collapsing?

The Mechanics Are Baffling Me

I tried setting up an account yesterday. Friction hit me instantly. You need a non-custodial wallet, a stash of SOL tokens, and then you have to drop a ridiculous amount of actual fiat currency on a JPEG of a shoe just to start pacing your own neighborhood.

I sketched out a quick breakdown of my specific pain points:

Is this just highly gamified fitness?

Here is what I urgently need you blockchain veterans to clarify regarding what is Move-to-Earn (e.g., STEPN)?:

• Sustainability: Who is actually subsidizing my morning run? Where does the external liquidity originate?
• App choice: Are we absolutely locked into STEPN, or do newer alternatives treat beginner wallets better?
• Operational Reality: If I buy a basic "Jogger" NFT today, am I going to see a genuine return before my phone battery fries?

Talk to me like I'm five.

I really want to justify tracking my weekend pavement pounding. I just keep freezing at the marketplace checkout screen. If you've been grinding these apps for months, give me the ugly, unfiltered truth. What is Move-to-Earn (e.g., STEPN)? Is the financial juice actually worth the blister-inducing squeeze?