XT cameras, and XT2 cameras will always have free cloud subscription.
Better, if you have had them over a year, they must have been registered before the 15th April 2020 cut off date, and as such, you can also buy the new outdoor/indoor/mini cameras and you will be grandfathered into your free storage.
See email content I received just today:
Store your clips locally for no additional fee using the included Sync Module 2 — all you need is a USB flash drive. For the convenience and added benefits of cloud storage, a free trial of the Blink Subscription valid through March 31st is available with the purchase of each new Indoor and Outdoor.
Please Note: XT, XT2, and legacy Indoor cams will continue to receive the existing free storage. Accounts created before 4/15/20 will also receive free storage for new cameras including Mini and our new Indoor and Outdoor.
*Battery life will vary based on device settings, use, and environmental factors.