Okay, ignore my last post.

The team decided that there would be too much confusion with players trying to figure out what counts and what does not with the last post. So, as long as an upgrade has its own unique name - you're good. Count it towards the multiplier...
Important: You are responsible for keeping a list of all unique upgrades for your UU Multiplier. The team may ask you to provide this information, but do not list them when you provide your final score. Uniques Upgrades are upgrades that have different names. So, event though Fridge of Steel (Refrigerator) and Firaxium Wiring (TV) both make an item unbreakable - both can be counted towards your multiplier. But, you would not be able to count two different "Self Cleaning" upgrades to two different items if Self Cleaning was the name of the upgrade.