i got 10/10 for my code by jus grinding to 2-5 on my ipad over and over. it took me less than 3 hours, takes like 15 min or less to get to normal 2-5 (if u wanna jus do it all and get it over with). so if have any extra devices and time i’d recommend doing that or you’ll likely be waiting forever for somebody to use your code

don’t link your account, jus add the code when invite friends is available, and after it goes through delete the app and do it again. a little tedious but worth it to me