I would think that Wyndham would be interested in using AirBnB as a portal for their own rental program for non-hotel properties. The clientele using AirBnB is inclined toward those types of properties, not hotel rooms. It's also in many ways a younger demographic - I think of my kids who use AirBnB or VRBO for almost all of their travels, and would never go Wyndham to look for properties. So getting onto AirBnB gets Wyndham into a market they aren't reaching.
Also, if they start placing their rental inventory on AirBnB, that will generate sales leads for them in that same market/demographic, where they likely have little traction right now.
Of course, they also would like to shut down their owners who are commercially renting Wyndham on AirBnB, because those owners are now their competition.
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AS for AirBnB, it's just more of their continuing evolution from their beginnings as a hip site to link hosts and travelers into just another full service travel site, as they outgrow their original business model and local governments make that model increasingly difficult for AirBnB and the "hosts".
