Let’s look at it this way MD….
Let’s say it’s 5% Gamblers
and
95% porn
I don’t know about the porn industry, but I assume that you get paid on signup of a person… Lets say, though, that you get 20% of their monthly paid membership of $20 / month.
That is $4/month * 95 people = $380
Gamblers (CPA) would be: 5 players * $100 = $500
That is on a shitty CPA. And lifetime revenue share might be greater.
Which one do you think wins out?
My guess is that gambling spam is gaining ground on porn spam because 888 and others have shown to spammers that it is possible and very profitable.