My tactic for winnowing non-technical potential founders who respect what you bring to the table versus those who likely do not is the following. I point out to them I am already engaged in my own company using my extensive technical background to successfully market and sell on my own, and am quite busy and happily successful, but could carve out the 10 or so hours per month to provide my expertise guiding their technical decisions as a board member, even helping them find technical founders who have the time to implement. I give them a quick "taste" by describing what kinds of technologies and APIs someone implementing their idea would need to be involved in, and after some quick Googling, their top 2-3 potential competitors in either the same or adjacent spaces, and key decisions that straddle the business-technical spectrums they will need to make that they haven't thought of yet that can dramatically impact the technical architectural decisions an implementor would have to subsequently make. If some numbers are available, I give them a development budget and time line "rough sketch", and tell them I can work up a set of potential MIRRs for their implemented product/service if they have some available numbers from potential customers. I describe that board members with this much due diligence before board meetings typically receive a 2% stake pre-seed, then step back.<p>In every case so far, they have gone radio silent, and months later I always find out that their ideas still go unimplemented, which does not surprise me. I believe an authentic counteroffer for a genuine board position (if you already have a track record that aligns with the counteroffer) is a positive and non-combative response. If they genuinely appreciate what you bring to a potential team, they would believe it fair to exchange 2% for that value, or at least they will start dickering. If on the other hand they are just looking for Work For Hire on the cheap, they'll move their pitch onto the next technical persone they run into.