If i've done cards and didn't check my notifs the whole day I can get up to 50 just from the likes in card request thread alone
If i'm actually being active as a user it's harder to tell since i'm always checking as I get them but say I complete the daily quest with 3 threads and 20 posts (but usually more than that since once I start u can't shut me up) I could guess anywhere from 100-200?