Can publish plugin, but not test it

Seems like submitting plugins for review have (finally) been available to anyone (here).
The “Develop Your Own Plugin” button, though, is still missing.
This means I can develop & submit my plugin perfectly fine – I just don’t know whether it’s working…
I did apply for developer access - quite a few times actually (and I do have Plus) - but still no answer.
What should I do?