Please, be careful out there, the devs are not smiling
The dev are surely smiling because they don't want their investors to be turned off, scam developer even have a wider smile to make investors think that they are friendly and kind and invest in their project.
And if you must invest in a project you are not too sure of, always put something small, don't go all in, you might end up regretting.
I agree, if we are unsure we should only set a small fraction of our investment fund, and even if we are too sure about the project, we should only invest what we can afford to lose so that when the investment comes southward, our livelihood is not affected by the lost of investment.