Bulk posting in my OWN groups?

Basically I got a website with new auctions popping up constantly (like, every 10 minutes).

I'd like to make a Facebook group for each category and make a new post for every auction on the corresponding category group (this is done to make my users able to "subscribe" to a category and view updates through Facebook).

This will of course be done automatically.

However, my conce is whether or not Facebook will allow this?
I mean obviously I wouldn't be allowed to post so heavily, however I am the admin of the groups so would this be an issue?