The PH comments:
This website looks extremely untrustworthy, purely from a design standpoint. I feel a lot of potential users would be put off by this!
Interesting idea. Terrible site design. Unclear if they're charging for this added convenience.
And then...boom.
I suspect just like the concierge at a hotel, the cut comes from the provider of the service (a dozen roses for 100 bucks - they can afford some affiliate fees from that)
Payment pages should really be linked to an order ID of some sort, without which customers shouldn't be allowed to pay. Otherwise, lots of things can go wrong. Depending on how they have configured things on the server side, a customer could change the amount being paid and the system would consider the ticket paid, cheating them out of money. Or a customer could follow an old link and wind up paying twice if they thought it didn't go through the first time.
Make sure top phone # is tappable on mobile browsers.
Examples that don't make me question your ability to deliver - airline example seems to be hiding complexity (I question it as I read it), others really good