The only source of income the guides have is the tips that generous people think that they’re worth after having taken the awesome tour. We don’t get sponsored by the city or anyone else. Any tip is accepted of course, in this way, anyone can join no matter what your travel budget is.
Tour is tip-based, however, we have to charge €1,55 entertainment tax at the start of the tour. For more info https://tinyurl.com/yx7os486