booking.com tells you what level of 'genius' you are, but not how many levels there are in total. How many levels are there?
Well, thank you - today I learned I'm at Genius Level 2, and it's the top level :D
Genius levels on Booking.com tells you your level.
And from other blogs, this is confirmed, and there's hope that more may be added.
There are currently two Booking Genius levels. The basic benefit of Booking Genius level 1 is 10% off at select hotels (they need to have a minimum user rating of 7.5 to participate, so you’re only getting the good stuff). Once you get to Booking Genius level 2 by completing five stays in two years, those hotels can offer you up to 15% off and sometimes free breakfast. I’m hoping that eventually they’ll introduce Booking Genius level 3 or Booking Genius level 4 for frequent travelers like us!
UPDATE: There are now 3 levels, I got an email this morning saying I've been upgraded.