You would need to stake some funds. Not a big deal. The "yield" would probably be quite small so you would need to make that up with volume. Might be tough to achieve that kind of volume at first. Fragmented UTXOs are another problem. You give away their privacy if you consolidate them. Could be used to do fedimint pegouts, though. You can get most of these privacy benefits for fedimint users by implementing payjoin.