I've looked at it as an option and it requires a bit of work as the way the keys are sent and constructed aren't an easy conversion. It could be done but there may be fees to reconstruct the multisig. I was looking at funding the wallet bitcoin balance with ark or lightning in future.

It's kind of both - it's 2of3 but not like ecash where there is trust required for the issue, and more like 2of2 as in ark but without requiring a coordination server or arbitrator.

Min amount is the bitcoin tx amount, it's not competing with micro transactions of fractions of cents, I've set it at 2000 sats at the moment, 1000 or smaller can be done but you have to batch the sweeps or everything disappears with the mining fee back on chain. It's meant for everyday purchase of a coffee or shopping online.

I think it could be used for tipping as it would make being a content creator viable. Kind of like busking where gold coins or notes are expected because giving them a stack of your unwanted silver coin change is a bit of an insult ;)