The team knows what they are doing, At the last moment, they made the excuse, API delays 
Dev and team will sell all their tokens first before the airdrop allocation is distributed
Nowadays all projects perform Like Every, First profit book team then price down 80% then some low amount airdrop provides community. Nyan same just use only community.
You are right, Nyan is not the only one, Mon and Param also done the same thing now, although Mon has not announced its results for farmers yet, but I fear they will do the same thing. And upcoming sci-fi airdrops like beyond, and Bubble might do the same thing as well. In this hype market, not every project is going to make us money. One thing I have learned so far is that, when a project runs for longer period of time and a lot of people have joined them, then you you expect lesser reward.
And vice versa, overall, what these all projects did is not a wise thing, and we should really not get too attached to these projects in terms of profit, I mean the way these projects succeed no one could wonder they will do such thing with there community but they still think about themselves, they are not the only ones BlockGames also did the same thing.