You can avoid the majority of these issues by choosing your campaigns carefully based on how much future potential the project can have not just whether its paying the most rewards or has the largest social media presence or biggest hardcap as these factors don't necessarily guarantee success especially in todays rapidly changing market place
You're right, actually it's a simple thing. If we decide to join and support a project, we must be prepared with all the risks. So do the best analysis possible, accept the risks that might occur, and do it according to ability and willingness.