Any thing that offers an incentive for people to join the group will always get a much bigger group, while size of the telegram group is often a good indicator for ICO success things like that prove otherwise. I've seen absolutely garbage projects with thousands of members compared to some absolute gems with a few hundred.
I agree, but I think Polymath is different since they skipped their ICO and went straight into an airdrop. As a project, it's a good one. probably one of the best this year. I would watch this one closely in the upcoming weeks/months