Yes, it did make me stop going there as often. I used to check the marketplace forums more actively as I do now.
The only time I visit the marketplace now is if I want to sell a site/domain or hold a contest. With the new fees, Sitepoint is great for selling websites that are truely worth $500+. More people serious in buying websites for $xxxx are checking SP marketplace for good valued sites. This is one positive for their new fees.
But now you don't have a place to sell sites for under $100.
Just my opinion