Airbnb actually developed an internal competency to manage their photography process. Turned out it was/is core to their site and found they needed to own the process. So they have a team at Airbnb that manages relationships with thousands of photographers (who are independent contractors).

While at Zaarly, we considered a number of options for our photography on the site but ultimately decided to go a similar route as Airbnb because the quality, look/feel and process mattered greatly to the individuals we featured on our site and it mattered to the general design and feel we wanted to provide.

Good photography matters. If you want to do it well, don't underinvest or try and cut corners. You can quickly tell the difference between professional shots and stock photography.

they use marketplace

I believe Airbnb have their own photographers. Professional photography is available in many places, but it is always not available everywhere or. In some cities, Airbnb matches hosts with professional photographers. To check if the service is available in your area, request a quote, and schedule a photo shoot, visit the professional photography page.
How it works? Well it works somewhat like this:
1. Submit request & approve price: After entering your ‘Listing ID’ in the box above, you will receive a follow-up email with a price quote. Click the link in the email to approve and confirm your photoshoot.
2. Schedule your photoshoot: Once you have confirmed the price quote, we will connect you with a local photographer. They will contact you either via email or phone to schedule a date for the photoshoot.
3. Preparation & photoshoot: Prepare for the shoot by cleaning and styling your listing. Review our tips below for more info on how to prepare. The shoot will take up to one hour but varies based on listing size.
4. Publishing & payment: The images will be published to your listing once retouching is complete. Payment comes from future bookings and is typically paid off with one or two nights.
Besides if you do have any questions give me a call: https://clarity.fm/joy-brotonath