Today I've bought 2 sponsorship opportunities on Sage Grayson's list. Because they are on 75% sale! Which is a steal for $19 to be promoted to a list of 8.5K people.
I have bought previously this sponsorship full price to test out the channel. I got 109 subscribers first time. Then a couple of month later launching another offer through another lead magnet - and got 47 subscribers.
So no brainer - got 2 spots for future on sale.