I have seen many df and work hard to be reinstated. Straight after they start a fade. I think a lot who are df only work towards reinstatement so they can reestablish family ties before leaving again.
I agree with Mickey. All of my relatives that were ever DF'd did this exact thing. Got reinstated and faded within a year. We have lots of large family get togethers with non-JW family and it seems horrible to them that some family can't attend because they were DF'd by JWs.
When told why a few folks were not at a family reunion, one of my country non-JW cousins said "Sh*t, everybody sins. Even y'all eljers (thats how she pronounces elders), trust me, they sin too, ain't nobody that holy. Sh***********t, you can't kick nobody out no church. Thats God's house." The JWs in the family always get upset and start into Jehovah holy spirit, blah, blah, blah. Then the JWs pressure the DF'd folks to get reinstated because it brings reproach on Jehovah's name because the non-JW relatives don't understand, blah, blah, blah.
It can get to be a little crazy. That's why I decided not to DA.
Outside of my family, I know several born-ins that left many years ago and never came back. Most went back to school, started a whole new life and are doing quite well for themselves. When I would see them, they would always either speak or smile. And their parents are always bragging about their accomplishments.