GPL & "non profit use only"

[Henrik Nordström]

mån 2010-03-15 klockan 22:15 +0100 skrev Janez Pers:

> It is not an issue of dual licensing, it is clearly GPL with
> ad-hoc added terms. (Dual licensing is pretty much clear
> and a very good option (e.g. you pay NOT to be bound with
> GPL, which may be pretty reasonable business decision).

My understanding is that you can not add restrictions to GPL and still
call it GPL.

You can add additional license grants which is not given by GPL, but
those need to be optional, allowing others to redistribute the work (or
derivates) using GPL alone if they like. (well, not actually sure on the
optional part)

You can add clarifications on your intentions with the licensing, but
those are not binding as a license.

Regards
Henrik