After the success of Notecoin, telegram airdrops became very popular and attractive. It seems that's the new trend and it might last until the end of the bull run. For sure many of them will end up becoming a wasted effort. I am engaged actively in two of them after I have been introduced to about seven different airdrops. I don't give them all your time because there is no certainty that they will end up profitable. My position is that you don't have to put all your hope in them to make money. Use them for fun and get these airdrops. If they end up becoming profitable you celebrate your success. If it turns out a waste of time and resources, that's business.
It is true that telegrams airdrops have become very popular following the success of Notcoin ,and TOn which I was the first successful coion launched on telegram channel. TON network seems well established and well known for its high transaction speed. The upcoming projects on telegram are Dogs and Hapster with massive community. Hope these projects will prove to be rewarding for the participants after listing.