In my opinion, Tachain is a great project and it can be a pioneer in combining advertising and transport. With the discussion about the money-back guarantee, you get the impression that the project has already failed. I'm still optimistic that Tachain will be successful.
I think it may generate mixed feelings in the community, but at same time, they are just trying to promote their brand through the use of money back guarantee plan and yea, as at the moment, they are the only one offering such unique feature in the blockchain industry but then again, they need to boost the confidence of investors for them to like come in