True (I don't know if it's half but it's a large percentage). However the mass 1 input to many 300 sat outputs continue, they are still there in every block, if fewer of them.

I suppose they are some kind of token standard right now but i'm not sure. On ordpool they appear as xyxyxz.btc over and over (just with different numbers).

I suppose that after the 'mint' is over and speculators move to the next token... the minter can decide to consolidate at any cost and try again, or just abandon the utxos completey. However they are leaving potentially hundreds of $$ of bitcoin on the table though in many small utxos with every block... so I'm not sure how it is economically sustainable for them. When they run out of buyers... they just run out of money even at today's low fee rates.