We've got some interesting ideas here. From the mentors we've talk to already, a lot of them love the fact that they can start by offering "micro-mentorship". Giving startups advice with just 1 hour a week time commitment (split into 15 min chunks per startup they help). And they can do it from the comfort of their home.
That'll require a bit of curation by the nReduce team so the mentors only see the valid, honest questions submitted. But we're working on a way to manage that workload (between the nReduce partners and moderators).
What mentors get out of it is being exposed to lots of early stage startups and possibly find some great teams that they enjoy working with and can step in as official advisory roles if there's a fit.