Noun
English Wikipedia has an article on:brand loyaltyWikipedia
brand loyalty
The positive feelings towards a brand and dedication to purchase the same product or service repeatedly, regardless of deficiencies, a competitor's actions, or changes in the environment.
I'll tell you why I like the cigarette business. ... It costs a penny to make. Sell it for a dollar. It's addictive. And there's fantastic brand loyalty. Warren Buffett
You need to look no further than Apple's iPhone to see how fast brilliantly written software presented on a beautifully designed device with a spectacular user interface will throw all the accepted notions about pricing, billing platforms and brand loyalty right out the window. Edgar Bronfman, Jr.