In return the agencies provide the dating sites with women's profiles and people to operate them. Agencies find attractive women (usually through online job ads), and pay them to use their pictures and profile information.
The purpose of this post if to help you understand what you're getting into, so that you can spot and avoid dating scams from a mile away.
They mostly find their customer base from online ads, Google searches, and even the occasional commercial tv spot.
The master sites handle and process payments from men and then pay commissions to agencies, which are the next level in the system. The master sites pay a commission from their PPL fees to the local agencies.
If you want to contact them however you have to pay a fee.
Sometimes this fee is masqueraded as a "translation fee". Each message, email, or video correspondence will cost a certain amount of credits.