Okay, then come out clearly and ask to be paid. Given clarity and transparency, people can rationally debate whether the structure that is being proposed is best, perhaps some adjustments can be made, and then people can decide whether or not to buy in. That's what Ethereum did. There was a process of evolving the original proposal, eventually precise documents were written and posted laying out how many free coins the devs were going to get, where the BTC raised by selling most of the premine was going to go, etc. and then those who wanted to buy in did, those didn't, didn't.

If you run at as fraudulent scheme and make a bunch of deceptive statements about launch time, withholding information, later claiming it was a hobby or a joke when evidence clearly suggests otherwise, and generally running the whole thing in a manipulative, underhanded, and dishonest manner, then expect to be called out for it. Which is exactly what most of the instamine criticisms come down to.