extensive network, partnership with bona fide agencies, solid teams, high hype, and good marketing (advertising on large platforms). That is one of the best criteria, in my opinion. The seriousness of the project can be seen from the marketing strategy and cooperation carried out with various competent parties.
Perhaps, we are hard to see it in a package instead of seeing them more on scamming activities. But I saw the market turns into good by now, it eventually changing its course for new environmental features where we could see more legit projects than of the fake ones.
It is just have to exert some effort in finding those projects that we could a reliable market demand not just today but looking it forward in the future.