Dark patterns may help profits in the short-term, but they're terrible for your brand. Just ask TicketMaster.
It isn't just tech-savvy users that will catch on to this either. If an everyday user uses Booking.com, reads reviews and thinks their room will be great, but then has a bad experience, they're going to stop trusting Booking.com's reviews, and stop trusting their brand. It will only take a few bad experiences to go elsewhere.