If it’s a physical magazine, the publisher kind of expects that more than one person will read the subscriber copies. For example, a lot of businesses might take out a subscription and leave issues in their waiting rooms for all the customers to read.
Likewise, some subscriptions like cable TV and internet are understood to be “per household” so if there’s 10 people living there, they all use the same subscription. They don’t each have to take one out. It’s understood you don’t let your next door neighbors use it or strangers use it, etc.
In cases where it’s an individual subscription with a password, if it’s something like Spotify then you might put it on your speakers for others to listen to, which is fine, that’s a legitimate reason people use it - to play a playlist at their party or over their Zoom for their friends or whatever. But if somebody wants to actually use the functions in the Spotify account, then they get their own. It’s just common sense.