A beta version is nice but it's a beta, i.e., it's not thought for use on productive systems. Paying is fine too but there're always developer releases of OS X and the GPGTools developers should therefore to get their app ready on or shortly after the release of a new major OS X version.

At the same time, I assume that the developers are well aware of the delay issue. So what exactly causes the delay? Is there any way to support the GPGTools developers in this regard?