[layer8]

It’s fine to use whatever license you think is right. That includes the choice of using a permissive license. Restrictions are generally an impediment for adoption, due to their legal risk, even for morally immaculate users. I think that not placing usage restrictions on open source is just as natural as not placing usage restrictions on published research papers.

[martin-t]

Tragedy of the commons. If all software had (compatible) clauses about permitted usage, then the choice would be to rewrite it inhouse or accept the restrictions. When there are alternatives (copyleft or permissive) which are not significantly worse, those will get used instead, even if taken in isolation, the restricted software was a bigger social good.