This looks like a very interesting project, but one important thing to consider:
With websites like Trip Advisor and such, it's somewhat easy to spot the fake reviews. Also, because no one gets financially rewarded, people trust the opinions expressed.
But what happens when you're rewarded for your travel reviews? Your ranking goes higher and your posts become more visible, and soon enough the homepage (like steemit) is threatened by being overwhelmed with "top" posts that are controlled by a very small % of the community. What then stops businesses (hotels, restaurants, etc) from paying these authors to make positive reviews about them? They could do that and the reader would never know...Like, the monetization of the review automatically gives it less credibility...
Not to say that this potential problem doesn't have a solution; of course there are many ways to prevent this, and it seems like the team is at least somewhat aware of this and taking some steps to prevent this from happening.