I think it may be real.
There was a failed startup with this name a few years ago:
Introducing people to the exhilaration of wilderness adventure is Bonvoy Adventure Travel’s prime objective. But now there’s one more reason for guests to be excited about traveling with this innovative company.
Bonvoy Adventure Travel in 2014 is asking clients to decide what they’re willing to pay for their journey into the wild. This is the first and only travel company offering Flex Pricingthat lets travelers name their own prices on select domestic trips. With more control over travel costs, Sean Jackson, founder and CEO, hopes people can find wiggle room in their budgets for much needed getaways this year.
It also appears that Marriott grabbed marriottbonvoy.com back in April