Just an FYI according to my call this morning, if you do the eats pass, it's active now.
Your $10 goes to the membership. And 5% of a $15 order is a 75 cents even if you pick it up.
Using the $10 from your Uber wallet for $10 credit on food is different and I don't think you will get 5% off. However, when it goes active, having your card added to the wallet will ensure the credit is available to use when it does go live. The CS did not say when for this.
My understanding is you don't get both things. You may have offers on more than one card, but I doubt they will combine.