A premine is a little different for these coins. Assuming they're keeping the emission curve similar to the other coins using this . . even a 1% premine will be a massive overhang to this.

MRO has been around for about two weeks now, and 1% of the currency is 184k. Of the roughly 300k or so in circulation . . I hope you can see the major difference here.

Generally with bitcoin protocol, your premine is offset with a corresponding instamine, so within a week or two the people using the coin have around as much as the premine.

That's not the case here, because even taking a 5% premine would mean that it would take about a month and a half before people hold as much as that premine.

I still think it's an interesting idea to keep the devs with long term income because it sets the precedent that people can work for the coin and make a legitimate living, but don't really see a great way to make it happen.

The tx donation idea is probably your best possibility, so as to not centralize all the miners into a 0% donation pool.