I am having problems with KAYAK not searching all hotels. For example Paris 4/6 for 1 night (other dates are an issue as well). Hilton, Marriott and Intercontineal brands do not show up. I have verified that no filters are on but it looks like only independent hotels (and a few ACCOR hotels) are showing up. The hotels show on other sites (for example Priceline which is also owned by the same company, bookings holdings, as owns Kayak) I checked other destinations in France and also in the US for those dates and it seems to works fine.