I've had three accounts over the years and I come back for bursts of activity about twice a year. I know some stuff if you have questions but as I'm not super active, you'd be better off asking someone else since you probably wouldn't get a timely response, lol.
BLUPing increases the GP and inborn skills your foals have. 100% BLUP is acheived by fully training (including rides, the skill will become bold when it's done) the top 3 skills on a horse (the ones with the little arrow by it), achieving 20 wins, and the horse being at least 10 years old