These points always seem to come up every month. To be honest, if you can not find a good drinking under $20 wine, you are not doing your homework. Seriously, there are a lot of good QPR wines out there. No more than 9 people participated in the December TAA, despite the fact the bottle price was over $35 for most of us and it was a highly regarded 2000 Bordeaux. The TAA doesn't have to be a knockout $50-100 wine.
The biggest problem with participation is the lack of availability. Georgia folks can't get the same wine as Chicago folks who can't get the same wine as California folks. The Pine Ridge CB-V had the highest participation level because, IMO, of the availability.
I would agree that the rule regarding a reviewed wine needs to be lifted or lenient. The fact that we limit to non-reviewed wines for the TAA has a direct correlation to availability. I think allowing a Parker reviewed wines is appropriate, where as maybe a WS reviewed wine is banned?
Your approach to the 2500 member thing is ridiculous. A better statistical breakdown would be to look at the participating members of the board. But, that number is difficult to know. Who knows how many people participate, but don't feel comfortable posting?