Story Origin for Nonfiction?

I have a Bookfunnel account and use it to build my science fiction newsletter subscriber base. I do group promos mostly. I’ve recently created my reader magnet for Christian nonfiction and am working on building that newsletter base. Unfortunately, there aren’t any group promos planned for BF in the nonfiction Christian space until April.

Does anyone use StoryOrigin in this manner? Do they have group promos in that catagory fairly often? Trying to decide if it’s time to upgrade my plan for that site and I think this will help me make the decision.

Thanks in advance!