Blurbs added to a collection are always attributed to the person that added the game to a collection, rather than the person that wrote the blurb.

Steps to reproduce
1. Create a collection, and add another user as a contributor.
2. User 1 adds a game to the collection
3. User 2 adds a blurb for that game

Expected outcome
Display should read "User 2 says ..."

Observed outcome
Display reads "User 1 says ..."