A few weeks ago I was experimenting with transferring subscriptions if a user makes a logout or logs in with their login ("test1") from another device. Until recently, subscriptions were transferred to another device or login, but were canceled on the old login and device. Now I observe that it is enough to enter user Id on other devices and all devices will get a subscription, even if they have different google account. Anonymous ids are added to the "test1" account. So even those devices where the user left the account get subscriptions. It turns out that users just tell each other userid and everyone can buy a subscription to only onсe. How to restore the behavior where a user can use only one device and can't share a subscription only by passing his userid?
Best answer by ryan
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