@Inna22
Thank you for your revert. Actually my angle was mostly about learning from them rather than collaboration. So by seeing their websites/AirBnB listings, how they do it, it can help me grow forward. Noted on Sonder - this is already very helpful, I checked their AirBnB profile.
AirBnB already has a lot of materials/case studies to help you. This was more about going to the next level and trying to scale up. Hope this makes sense!
Thank you once again for your help!