it is not recommended to join project not able to reach soft cap, this mean the project may close at any time, even the project is good it is not grantee it can success
It still depends on the persistence of the developer there are projects that did not reach the softcap only half of it, but the developer is persistent to push through with the project, and some projects had private investors on their projects, so even if the project did not reach the softcap, there are still chances that the dev will continue it.