High Value Target review for Grid & Pixel Email‑SMS‑Popups

What I found is that the sale I run must match whatever templates Grid Pixel provides. If I want to run a sale on a specific product at say 25% off, I have to hope there is a Grid Pixel template with the same sale because I can't change the templates. If I try to change the template there are glitches. Btw, there appears to be no option available anywhere to cancel the Grid Pixel subscription, there is only an option to change the plan.