A few questions about the Discounts/Promotions egine

I'm using Episerver version 9.11.0.0, and the "new" promotions engine / discounts:

1.  Is it possible to "hide" some of the built-in Discount types so that they don't show up as choices in commerce manager?  (/AMEPiServer/Commerce/Marketing)

I know that they are "Content" in episerver.  But when I view their Content settings in CMS->Admin->ContentType, I cannot uncheck "Available in edit view".

2.  What database table holds the data for Campains & Discounts that I set up in commerce manager?

Thanks so much for any help!

 - Ken