The renter - you rented the apartment, it would not cost the landlord anything extra if you sublet it, yet many places have restrictions on subletting. I am ta

The renter - you rented the apartment, it would not cost the landlord anything extra if you sublet it, yet many places have restrictions on subletting. I am targetting your notion that if it doesnt cost the vendor anything extra you can do whatever you want. Both in case of the airline ticket and a concert ticket I think the situation is very similar to running software on multiple machine. There is a fixed cost to production, yet there are terms outlining how the user can use the product.