I am a writer between others on the Medium platform. I have already published one article about LockTrip that you can find here.
The bad thing with Medium is that you must find a publication relevant to what you are writing and be accepted to get your article read from many people. Furthermore, the don't allow affiliate marketing in most of the publications.
I don't give up, because I have some ideas to present LockTrip in articles about Blockchain technology and cryptocurrencies. I am thinking to write an article on where you can actually buy something with bitcoin, Litecoin, Ethereum, and BCH. Because everyone travels it can be a good way to track attention to the project, converting some people to actual users.
Furthermore, I try to make the same with other platforms like Reddit.
One other thought is to make flyers that I will post regularly on Twitter with a 5% discount. Somebody will click on them.