Yes, they are traders who consider themselves a community  . It's really difficult to hold, even for those who launch tokens via airdrop, most of they receive is a dump during distribution. The reason, as you mentioned, is the concern that long-term holding of the acquired tokens will become unsold, or that the dev team will discontinue the project due to lost interest, and the lack of community support for post-distribution follow-up. Indeed, not all those who sell airdrop tokens are worried about the sustainability of the tokens, some also have financial problems which ultimately lead to selling after holding for a long time. but, for buying from ICO, IEO etc, buyers should be aware not to sell early in the listing as a support. However, the large number of failed projects in the first year has meant that the majority of successful token sales failed to survive.