Everyone seems to assume that the Dom has complete control over
the finances of the sub.

What if the sub is using a dummy acount for the Dom.If the sub is
a multimillionaire ceo and has an account with twenty,thirty or
even a hundred thousand its just a drop in the bucket for them
but the fantasy remains.or if they're married he works but she
controls every aspect of the finances.And when hes bad he has
to hand over a twenty with every spank.

As for the websites it could be a monthly fee like you would pay for
a porn site but they use it in chat as a means to control the sub

There are to many variables to just denounce them and make them
outcasts of an outcast community.There will be those who abuse
this fetish just like there are people who abuse BDSM but there will
also be good people who just enjoy this kind of power exchange.

Just be cautious and keep an open mind.