I have rom, so can't use new android pay. How to stop getting updated.

I am on a custom rom (N5 on CM12.1) and rooted so android pay will not work for me. Now I am not too upset about not being able to pay with it, but it is kinda dumb that I can't even get access to my loyalty and gift cards without adding a credit card. So I uninstalled android pay, installed v8 of google wallet. I then unlinked to market using Titatinium backup, but the next day I see not only is it reconnected to market, but is due for update. I disconnected it from market again, and verified that it didn't show up as needing an update, but the next day I see that android pay has been updated.

So my real question is there no way to access loyalty cards without adding credit card? If not I am guessing that google play services is taking control of things and is automatically updating google wallet whether it is linked to market or not, so what can I do to stop it updating itself?

Thanks.