It seems use 60 sec GPU quota instead of real time usage?

ty for the exhaustive explanation. it’s simply because 2 day ago i remember to have generated at least 15(?) (sry don’t remember exactly) , that was enough for some testing, with 3 i need 1 week for decent result every time. maybe they changed the one i was trying using? (SDXL Text To Image - a Hugging Face Space by wifi-lover)