They must be rich. €50 * 50000 XLF = €2 500 000. Rijk made a lot of money from the promised airdrop premine but I don't think people care because the price is high and only going higher. I would only be upset if I put all my coins in a holding account expecting the airdrop but investors and traders will be happy and you can't keep everyone happy.
At the time the sale of the premine was sold and handed over to other people, the course of the price was around 3 euro. So these investors didnt pay 50 x 50000 xfl.
So you're whole calculation is wrong
The premine is 45000 not 50000 and obviously an investor will not buy them above marketprice in such a deal. So the market price of the premine was around 120.000 euro , so not a lot of money.
" I would only be upset if I put all my coins in a holding account expecting the airdrop"
Well, since no single detail was ever released on the specifics of the airdrop, that is kind of the own decision of the people to lock everything up with a long locking period...