The people withdrew from Moses. Then those who were willing came forward with gifts of materials for the sanctuary and used their skills for preparing and creating materials.
Not all came forward, only the willing. Were those who did not come forward excluded from the community? There is silence on this question. Certainly one might expect that such a drastic resolution would have been mentioned were this the case. So we may assume that failure to contribute did not result in exclusion or excommunication.
However, as has been commented, that which is freely given returns to the giver more than that which is given upon command or mandate. So, the fullest benefit of membership in the community goes to those who willingly step forward. As some have pointed out, some members of PV community are more actively involved than others. This does not exclude those who only show up sporadically from the community, but it does provide greater return to those who do.
But then, there is a point at which enough – indeed, more than enough – has been given for the work to be done. Is this perhaps the source of Hillel’s first question? Yes, give. But we are not asked to give without limits. We are not commanded to give everything. Giving makes us not just for ourselves, but we must also be for ourselves, and recognize that neither service to the community nor service to the One – if there is a difference – does not require giving everything. We must also take care of our own selves, and recognize when enough giving is enough.