Thanks for the feedback. You can change the price to USD in the top bar of the page. We are working on a smarter way to set the currency on first visit.
In regards to the Mob Museum we will take a look and fix. Sometimes the APIs we use are not very specific in regards to child / adult pricing.
We just checked again and the prices are correct.
Some vendors charge a booking fee which they do not show at the first page but only if you proceed to checkout.
E.g. the last offer for $29 has $3 booking fee. We always show the full price including all fees.
Currently for us the limiting factor is API availability. Most of the official sites don't offer an API so we would need to scrape them one by one. For sites which offer an affiliate program we joined to finance the project but our ranking is not dependent on what we earn but strictly on price.
Thanks for the feedback!! We are planning on adding these! Our first version though includes 6 big providers which have worldwide reach.
We did some test and vs some official sites we are cheaper (e.g. Empire State) however on some we are a bit more expensive (e.g. Vatican Museum). But as said we are planning to add all of them.
A bit more context. We created a price comparison for attraction tickets, in-destination tours and activities. We were surprised to lear how much you can save by choosing the best provider (check out New York City).