That sounds cool but I'm not sure how realistic that would be for most people, esp. international. There are about 2-3 hotel chains I can think about here in Europe where I have had more than one stay, i.e. where I used the same chain in a different city.

JFTR, my last stay in Prague I paid 80 EUR for a perfectly fine Hotel room, the cheapest room in the Prague Hilton I can find (being flexible for whole Oct+Nov) is 130EUR, usually more like 140+, close to double.

So I suppose if I had to just take a different room in a different hotel every fifth time (and that never happened to me) I'd still be about equal with the price.