This feels like a bait and switch. Saw a free app, installed it, registered, gave it permissions and my location, and only THEN did I find out the the actual feature of the game 'SuperTrip' is a paid feature and requires an account upgrade.
Sorry you feel that way. I specify in the description, the website, and images that the adventure mode is paid. That's why FoodTrip is free (and personally, I think FoodTrip is better haha).
However it's completely understandable if you didn't read it. So again, sorry about that!
Is there a booking system built in. Presumably the restaurants pay to be featured - so you pay for FoodTrip in the cost of your meal [as with all marketing] - but if you do a FoodTrip is there a way to make sure you don't arrive and not get a table?
There is no restaurant featuring or anything like that. The game only takes distance and price into account, which the user specifies, when you FoodTrip. This is literal free marketing for restaurants right now.