You know it's fraudulent. If they won't go along with you on the don't commit fraud thing--and I agree with you in that ICOs are at best penny-stock trash and s

You know it's fraudulent. If they won't go along with you on the don't commit fraud thing--and I agree with you in that ICOs are at best penny-stock trash and scams at the median and worst--I see no way I could react other than to quit. You're talking about a Series A company. The likelihood that your equity is worth anything remains very low. The likelihood that you will burn your good name and have trouble looking yourself in the mirror strikes me as much higher and much more destructive than that. And you have more than just those lessons learned for four years--you can still leverage that you were the CTO and handled much of the heavy lifting of that company, and point out that you left because your founders were doing dirty. I am very not a lawyer, I am very not your lawyer, and this is very not legal advice, but depending on jurisdiction you may have some leverage as far as that equity if you really want to chase it (though, again, I don't expect it to be worth much). "I quit because they were being galactically scummy" has some persuasion to it. And definitely talk to a lawyer before you go public with the dirt.