Hasn't something like this been done for a LONG time? Flights are like this too. Depending on even the state you are searching "from" it can change prices for a flight or hotel. I didn't think this was news to anyone? Archive: https://archive.today/anOks From the post: >>The most popular hotel booking sites raise their prices substantially when San Franciscans use their online booking platforms — and most Bay Area travelers at large likely have no idea. This shady phenomenon, known as price discrimination, occurs when online retailers make judgments about what their customer will pay and then hike their rates accordingly. I set out to compare hotel prices — for the same hotel rooms, during the same spans of time — using different devices, browsers and while browsing from different geographic regions. The goal was to understand how online travel agencies adjusted their prices, and which metrics produce the lowest cost.