Valuation
 

I was wondering how much a domain is worth that currently under a cam site white label does revenues of around $1,000,000 per year?

imho equals to 5-12 months of revenue.

A bit depending on how much promotion goes into making that $1 000 000 a year. If you spend $2 000 000 to advertise it, the answer is of course that the value is not much.

But assume that you mean profit, after all costs.
Then you'd be looking at a very decent sized deal in the millions. Imagine if it was a domain which more or less handled itself, had automatic and natural traffic, then you'd possibly be able to put a valuation of several millions.

Is it camgirls.com?

It's not camgirls.com