[matkoniecz]

> We shouldn't take anyone seriously who promulgates a license but won't use it themselves in an inbound=outbound way.

I would just treat them as proprietary. With access to code and opened gate to provide also code, if you are paying someone and they still do not care about your bug.

What may be better than fully proprietary and unavailable source.

I would not dismiss for example Windows just because they are not open source.