You need an immense amount of users and a bearable female to male ratio if you want to attract straight people to a dating service. Any WAM dating site you do see will be a fake or at best a waste of the creators time. Just go on regular dates. People do lots for those they love.
If you really need someone who will be more open or understanding or kinky then start by interacting (in a non-dating way) with fetish communities.
At least look at sites that serve the kinky in general. If you find a partner into humiliation or sensation play, WAM will be a new way for them to approach it. Otherwise, it might be a fulfill your kink on Friday-fulfill their kink on Saturday opportunity.