The email doesn't indicate whether CJ will require a specific format from advertisers however all variations (tab separated text, RSS or Atom) are feed formats that are supported by Price Tapestry so you shouldn't have any problems migrating.
Bear in mind that when a feed format changes it will need to be re-registered.
Hi Philip,
Google support multiple formats for their own consumption of shopping data from merchants;
https://support.google.com/merchants/answer/160567
The email doesn't indicate whether CJ will require a specific format from advertisers however all variations (tab separated text, RSS or Atom) are feed formats that are supported by Price Tapestry so you shouldn't have any problems migrating.
Bear in mind that when a feed format changes it will need to be re-registered.
Cheers,
David.
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PriceTapestry.com