For what it is worth, I 100% agree with you. These exclusive deals really hurt seller's like yourself in the category you sell in.

I'm personally leaving at the end of jan 2017 - and will only sell on Ebay in the last quarter for toys. It's not worth my time anymore. The Feb-July periods are getting slower as each years passes. It will pick up again from Sept to december, but that window's getting smaller as well!

Luckily I don't depend on it as much as before. I generate most of my income from advertising (google adsense)! But I also have a website and sell on Amazon (a much easier platform for me to sell on). After selling here on and off for 15 years, the time has come.