120 trading ads is 1hr of my life wasted watching ads.
If the CPM of unity/AdSense ads is about £3 per 1000 views (UK), then I would happily pay £3 to remove 100 ads and get an hour of my life back.
That's a 10x return on investment for developers (if I don't click on ads).
We can buy gems so why not buy trades? Or have I missed something?