I wondered the same things. At least three of the women in Jan B videos made other interracial videos on their own that appeared on porn sites, I believe after the ones made with Jan B. Holly is the most well known for doing interracial videos and gang bangs. I think that she has meet-ups in different cities. In a couple of videos, a white guy appears who supposedly is her husband. I find her incredibly sexy and uninhibited. So, how many of the women were already "pro" or not exactly amateurs when they appeared in Jan B videos?
If a white woman or a married white couple wanted to meet BBC, they did not have to fly to Indianapolis to meet Jan B. Even before Craig's List, alternative newspapers in every city ran personal ads. Going to a disco, nightclub or a bar were options for meeting BBC. A college campus would have many virile young BBC happy to satisfy a white woman's or white couple's curiosity. I find it hard to believe that they needed Jan B to live out their fantasies.
On the other hand, some of the white women do seem genuinely nervous as Jan introduces them at the beginning of the videos. Their nervousness is one of the things that make Jan B videos so enjoyable. I would have liked to see and hear more from their husbands in the videos, but I guess that was off limits for Jan.
There are some videos in which a white man, whom I assume is Jan's husband, joins her on the bed and sucks BBC. I wonder why they didn't also produce videos of gay/bi white men who wanted to try BBC, or bi-husbands who wanted to join their wives in having sex with a BBC. Overall, the concept behind Jan B videos is hot.