Or how about you register as a tester over at OGT? Same difference.
Imo expanding the tester base is not an issue - improving (or rather in the case of OGT: maintaining) the quality of testing is more important, It's a time-consuming and a very pedantic chore at best. It's work, not play. As a designer, I prefer one or two good and committed testers to several dozen of nondescript, casual ones.
And, sorry for this following sentiment, I prefer my testers to be other course designers rather than players, because designers know what it takes do create a course and they know the difference between a technical error and a design choice. They won't waste my time with trees they don't like, pin positions or textures which they would want to be different - and instead focus on faulty meshes, missing physics and dodgy planting. Real designers can resist the temptation to design other courses by proxy in the disguise of being a tester, as we so often see happening in the community course comments.
True, you should be able to do everything and more on this PP site. I happen to believe that, too. From game information to Forums to course and asset downloads, testing and tournaments, everything should be here, instead of being disseminated over non-adjacent real estates.
But it isn't, that's simply not on and it won't happen. Bummer, but there we go.