Try making the term as a developer time limited, such as for a two-year period. The developer must actively renew the term. The point wouldn’t be to kick developers out after two years; there would be no limit on renewals and no requirement for approval. Rather, it makes the commitment a limited rather than unlimited one and forces the developer to periodically think: do I still want to do this? Then, passively taking no action causes the commitment to end, rather than the developer having to actively say “I don’t want to do this anymore.” This takes the shame out of it.