$20 million for airdrop? That is a huge one, but I wonder, instead of giving it away, why not use it to develop and market BFG better? That is a huge money when used properly can gain traction towards the platform. It can indeed fuel people into playing to Betfury, but after that what comes next? People who receive rewards in BFG will surely sell them making the price crash due to the sudden influx of tokens. I do not know if management has seen this before they execute this airdrop. Remember the market is affected by supply and demand, I hope this airdrop is worth the expenses for BFG.
It's worth noting that the Betfury team hasn't forgotten about the development of the BFG token. At least they announced updated tokenomics at the beginning of this year, which further positively affected the BFG price.
As for the Cryptodrop event, I think the influx of new audiences on the Betfury site will compensate them for its cost. At least I doubt that the Betfury team would hold an event with such a large prize pool if they were not sure of the result and the profit they can get in the future. Most likely their marketing team calculated everything in advance.
For now we cannot expect to much on their BFG token since provably that it will take a lot of time before this token would have good demand. But at least right now we are seeing such good promotion done by the team since those current things they do would provably increase their exposure and provably with those things they can convince lot of player to gamble or even stay in their casino.
Although they can really use those funds to pump their token, but the growth is artificial so in return there's still nothing happen. That's why its good to catch up always with latest things happening on their side since once they earn good revenue and have lots of regular player then provably that those developments what people thinking would provably will happen.
However, it's worth noting that the Cryptodrop app has only 362k monthly users. This is quite small compared to other tap apps, and if the Betfury team has an automated process, this number of users can be filtered out in a few days. 
