I agree with longtimelurker.
Airdrops is so 2017
If you want champions for your coin, find them, challenge them, charge them. Personally, I'm bored with all the stupid bounties and silly airdrops and massive discounts for whales. Many projects talk about giving power to the people, getting more users, but they all end up doing the same thing, casting coins (airdrops) into the wind and handing huge bags to whales who will dump as soon as it looks profitable.
I usually just lurked, then when I tried to log in for the first time in years (must have been back in 2013) I guess my account was locked...so that's why I'm a newcomer despite being an..."old comer?" Anyway I remember feather coin and aurora coin and all those random alts lol. Funny how some survive and some don't.
Anyway, I was really impressed with raiblocks but my main concern was security. I'm glad this looks to be more privacy oriented than raiblocks however I'd strongly advocate for expanding the team somewhat. If I'm not mistaken you've received >50k+ in donations (and counting). Congratulations. This, if used properly, can speed development as well as increase your personal gain from this venture.
As far as distribution goes, airdrops are a horrible way to go. They manage to simultaneously raise 0 money for the actual project in question, and yet favor whales over people that actually grow the overall value of the coin by getting the word out. Whales aren't bad people or anything, but if you want marketshare you want more people with a vested interest in your coin, not 10 dudes with 50% of the coins.
A far better solution is to pre-sell coins. What about whales you say? Well, make a cap, and only sell to people that commented on this thread before a certain timeframe. Ex. max donation is 500 bucks (or half an ether or whatever), and you must have a bitcoin talk account associated with the donation or you get nothing.
Again, seriously consider expanding the team. The good news is you have a ton of interest because of the underlying tech + strong demand. The bad news is that you have a limited window of opportunity to capitalize on that hype.
Best of luck,
A long time lurker.