Hey timsaid, nicely explained the growth of travel industry. Blockchain is no doubt a brilliant option for any industry.

Here, I am just suggesting something more on one of your view - Incentive. The companies will do it or few are doing the same but they providing the incentive on the basis of category.. Positive Review or Negative Reviews which is wrong.

Secondly, on Negative review almost all the companies giving some little discount amount in the form of their voucher for your next trip/stay and retain the customer for future.

One more point which you missed that Companies staff have to visit all the listed (on their website) hotels/places and can arrange personal meetings with all the vendors.

These can be help until Blockchain technology enters in the industry.

Please correct, if I was failed to understand :)