You can create 10 or more api using 10 or more gmails and then just write a rule to use every api for certain amount of requests
if you are able to manually determine how many times you can use one api
or use another api if error/block happens
api has daily limit so, when you reach the bottom it should start from the top again (script) when choosing api
(you can and should reuse each api, just make sure there's room for repetition)
idk about unlimited, take care not to get scammed or buy anything from yellow members because they can run away with your money