Apple prevents that I bring an outside donut from competitor's, while Android allows it. That is basically the difference.
I only know of the concept of Corkage, where you pay the restaurant a fee if you bring your own wine to drink:
https://www.webstaurantstore.com/blog/2626/corkage-fee-guide...
> A corkage fee is the price charged to guests who choose to bring their own bottle of wine to a restaurant. Corkage fees usually exist at restaurants that already serve wine. The practice of allowing guests to bring their own wine is considered a courtesy to guests. … The average corkage fee ranges from $10 to $40 per bottle but may be as high as $100 or more.
Or you know, they don't care as long you're a paid customer.
BTW, I didn't say anything about restaurants. Coffee shop in general have much more of a lax atmosphere, so they generally don't care too much.
Some do, some don't. In my experience, Starbucks couldn't care less as long as you buy a coffee (and even then couldn't care less. maybe a restaurant would care more but it's on bar logic: they don't mind lending seats until paying customers come in). Smaller shops tend to be more strict about doing that kind of thing.
Isn't the resolution the same in each case? If you have an iPhone and you want to install an app from another store, you have to buy another phone. It's the same with these deals with Android, just overt.