Terry and his moderators run a great site here, no argument about that.
I have been a contributor to Tradgang twice, once before the classifieds' fee and once after the classifieds' fee started last year. I found that I didn't do a lot of buying and selling last year so I didn't contribute this year. I've gotten into a few other things besides archery that have required membership fees this year so I just decided that I can't afford everything which is why I cut the classifieds' fees to Tradgang for this year. Who knows, I may decide to contribute next year.
I did notice last year that there just wasn't as much traffic in the classifieds and I believe that it's because less people are using it because of the fees. I've never had a bit of trouble from buying, selling, or trading on here, before or after the fees were put into play.
In my opinion, I believe the lower amount of transactions on the site is a mixture of all of the things mentioned above, with the main issue being less people browsing because they either can't or won't pay to use the classifieds.