An option is to try and make them a not-so-psuedo ex-cofounder. An amicable way to do this is to 'simply' try to buy them out - make an offer. Their actions s

An option is to try and make them a not-so-psuedo ex-cofounder. An amicable way to do this is to 'simply' try to buy them out - make an offer. Their actions show they're either unwilling or unable (due to other commitments?) to keep doing the hard work of being a founder, no matter how much they might still like the idea of being a founder. If you're lucky, they're aware of this, or can be made aware of this. Maybe they've only been sticking around out of a conflicted sense of obligation. "I can't just leave them in the lurch!" (nevermind that's exactly what they're doing by their actions, good intentions be damned.) A buyout offers them an out. If you're unlucky, at worst they'll probably want more money. Best of luck!