I can't say it's legitimate or it is not good to invest because what is good for another person might not good for the other or the other person might not have that interest to invest so if it is good for you then you done have to worry about others viewpoint of the project. Many might even tell you wrong impression of the project to discourage you to abandon the project. And I don't think I have heard of it or forgotten. I will only say if you are interested in it, carry on.

And as you have said anyone who's interested will test the project and when the mainnet has been launched, yoi can still update this thread. Nothing is waste because life itself is a risk.