I was wondering who will spend a hundred bucks to have a thousand of bit member in your telegram group, only to increase your number?
I think, making airdrops for everyone and they need to join in your telegram until the ICO finished to have extra bonus is another way of acquiring real members on the group, and it is a better way to look for possibly investors.
Yeah, that's nice way too. This increment may be useful when you have just created the group and you want to make some kind of activity from the beginning, because people aren't going to join to your group if you have low activity