I want to add to this question since I know some that are starting out and having been able to collect a few satoshis with ZBD, Fountain.FM and SN. Good on-ramp to start the journey but it’s still holding on the LN.

Also, I believe they are all custodial based but after a certain amount it might be worth pooling and moving to noncustodial wallet or figuring out the cost to move to a main network.