The issue is they wouldn’t deliver the items? I didn’t pick up on that in any of the new stories.
I think this a difficult concept to defend. Delivering is participating? I don’t see it. Amazon isn’t participating in my use of the items I buy from them by delivering them to me. The appliance delivery company that installed my washer and dryer didn’t participate in doing our laundry. And if we had a party and had flowers and cake delivered, those suppliers would not participate in our party. It’s none of their business.
When I was married I had a florist, a caterer, a photographer, and the women had their hair done at a local salon. We never thought that these people participated in our wedding. They were there, they were our paid contractors, paid to perform the services we contracted with them to perform. They didn’t have an opinion about the validity of our wedding - or, at least, none was offered or welcome. That would be inappropriate.
Our guests were invited to the wedding to participate in it.