Your study sounds very interesting and a good topic of social interaction, but too late.
I as a host must trust, guests must only show ID.
All of your contact information has been masked by Airbnb. No-one will be able to directly respond and participate.
I can tell you, my brother jumped on the Airbnb idea early and worked hard to be a trusted guest. I have only been a host for 9 months, and Airbnb has changed their model to service the guest and uses/discounts/devalues the host. The business model has changed from trust to profit.
Most Airbnb units are no longer home hosting offers, they are autonomous spaces rented out for profit prospectors who reap the benefit of hoteliers without the rules/licenses/protections to the traveler that modern-day hotels must meet.
Do an analysis of how many Airbnb spaces each host offers, your will find many have 4 – 80.
Find the single host if you want to research trust. You will find single space hosts the most interesting for your research. But it will not be about trust, it will be about survival.