It doesn't seem to me that most legitimate poker places would do a flat fee for an hour and not take a rake. I might be suspect of some place that did it, just because it was not the norm. If it was a real thing, of course you would play higher limits. But I would expect places that offer this type of deal would not have higher limits. This of course gets into the "more rake is better" discussion. I am looking for a low rake myself, but I suppose that should be amended to be "I am looking for a rake that is not unreasonable".