But I also saw some airdrops asking people to pay them little amounts of TON or Tron, in order to put them in a better place in a leaderboard.
This is how scam was in airdrops in the past. Many will become scam. Do not pay.
But I strongly believe that there must be some good measures for this issue as well.
What do you think?
There is no good measure than to avoid paying and also avoid phishing attack.