Hello,
One of the primary reasons is to keep those books--considered the most successful series in the entire game line--available for players who do not already have them (such as new players, returning players who have missed out when they were first printed, or players who--for some reason or another--lost their original copies, and do not want to search e-bay and discount bins for them.
Hopefully, that helps.
Thank you,
- Herbert Beas
BattleTech
Catalyst Game Labs
