If you're going to hodl for 6+ months anyways, then why not collect some fees on top of that like a JoinMarket maker?
Is there any recent discussion of how much JoinMarket makers can expect to earn? It's crossed my mind, but I'd like to gauge the expected gains vs. the risk of keeping private keys online.
<1%, it's very competitive. But that's a feature not a bug, users shouldn't have to pay a lot for privacy, or to move money to/from a sidechain quickly. Drivechain withdrawals don't share this hot wallet requirement so the return would be abysmal.
The Bitcoin mainnet doesn't care. That's why it's easier -- miners can openly attack the sidechain without anybody really caring.
We'd care if there was an attack on a sidechain because then we'd lose useful functionality that makes bitcoin worth more, even if you or I don't use that feature. BCH isn't pegged to BTC and it's anything
but useful.