Hello @rapharchick

#club5050 means you need to power up atleast 50% of your total earnings steem+SBD for 30 days counts

#club75 means atleast you power up 75% of your total steem+sbd earnings for 60 days counts

#club100 means you power up all total steem+sbd earnings for 90 days counts

If you do power up 50% for 30 days you can use tag #club5050

If you do power up 75% for 60 days you can use tag #club75

If you do 100% power up for 90 days you can freely use tag #club100

Hope it would help and goodluck thank you!