Iou is a peer to peer project where they provide a good bond during a full time of the project.so thats why the have huge amount of people
Doing a full time work to the project will not guaranteed they will be going to have alot of people who are investing in the project.
Yes, but giving such time for the project will give them the chance to become a successful project in the crypto community. It is better to do full time working on this project rather than nothing. People will mostly follows those project that has an active member who can response their questions.