PTP limits slop, yes, but in practice it still seems too hard to integrate by the masses.

You can't use something like PayPal or a VISA card (traditional payment methods) for these micropayments where you pay maybe 3 cents if you sign up and 3$ if you want to remain anonymous. You'll literally pay more in fees, or deal with inconvenience.

Bitcoin Lightning solves this greatly, since you can make these micropayments with no fees (assuming you do not use a custodial platform that charges its own platform fees)

But. Most don't use LN-BTC yet. Some heard of BTC and only know it as an investment that is "only going to zero", or criminal money. Others don't understand it (or a lack of wanting to understand it).

It's very difficult to integrate something like this with traditional payment methods, which inherently makes it niche. Stacker.news uses LN-BTC for PTP, and just because it uses Bitcoin (albeit Layer 2, which again not many use.) it's automatically niche.