See if you can follow me here, because this Google Merchant Center shit is insane
The way the Merchant Center is set up, you cannot, under any circumstances, use the same email address to administer multiple Merchant Center accounts for your clients. The only way you can do this is to either create a separate Google account for each client Merchant Center account, or else request a Multi Client Account with your clients' accounts as sub accounts to your own MCA.
However, you cannot request an MCA unless you already have your own Merchant Account, and according to the Google AdWords rep I just spent half an hour on the phone with, you can't created your own Merchant Account unless you have a website to post in it. I.E. your own website.
I don't run any ecommerce sites of my own, and I don't care to put my own site into the Merchant Center - there's no reason for it. There will never be any feed from it, there's no Trusted Store issue because I don't sell anything from it.
So instead I have to make or track separate accounts for each of my clients Merchant accounts - which isn't going to happen, what's going to happen is we just won't use PLA ads for all but one client.
How is that a win? Google's reasoning here is fucking insane.