may be airdrops should be at random dates with random percentage like this month airdrop 5% next month 8% following month 15%...etc that way nobody will ask when the airdrop is and nobody will dump their coins only normal selling and buying of the coin
Well, this idea is quite brilliant actually, but it can be improved. You could also split the airdrops in more little pieces so that sometimes all monthly airdrop comes in one day while other months it is slip up to X number of mini-airdrops. This way people wouldn't be able to play the speculation game even after having got the monthly airdrop

This idea wont work.
Tonych want distribute coins fairly between holders and btc holders.
That means % which distribution happens must match amount of btc in total.
So thats why random 8% or 5% would not work.
please go to byetaball.org and read how distribution is calculated.
Its not random % , all is done to match btc cap.