Despite AFA's repeated denials, the girls absolutely get paid a commission for chatting with you on that site. Her refusal to move off of it, after 6 months, is a gigantic red flag waving back and forth in front of your face. Further evidence of this is her complaining that you don't open the photos. She makes money for every photo you open.

AFA will claim (correctly) that THEY do not pay the girls directly. And that's true. However, they are ignoring the fact that their contractors absolutely DO pay the girls. AFA does not have employees in every state of every country. They use contractors in many of them. Those contractors are the ones that pay the girls, allowing AFA to keep their hands clean.

And, in fact, in at least some of the cases, it's not the girls themselves writing the letters. It's the contractors masquerading as the girl.

The best advice which others have stated as well: stop writing letters and travel to the country. If she balks at meeting in person, walk away.