Hey guys, I need suggestion for my site. I use Ebook trial offer from Mgcash now

Offer "PE - PICKAFLICK- Ebook Landing - Multi-Geo -Non-Incent " with payout 18$

From 1K traffic i have 4-6 sales. Maybe you know some other way to monetize my traffic? I could be your referer. My monthly traffic is 25K.
Who can offer me something better?