Recently there have been two more PieFed instances created, which offer accounts to anyone who wants one:
Feddit.online is hosted in USA which should make it a little faster for people there. It also has a different topic structure at https://feddit.online/topics than PieFed.social has.
It’s not that active, you’re actually on the most active Piefed instance https://piefed.fediverse.observer/list
Yes, the mother ship is much more active than any other Piefed instance.