its a big step to publish anything on horse racing or gambling for that matter.
the likelihood of anyone being able to support themselves on gambling is not high.
i have been following horses for a long time as an interest and am still not able to define a real good thing.
don scotts efforts were labor intensive but did give a discipline. i have no knowledge of his success rates or whether he died broke, other than seeing some posts in these forums. i would say that we learnt a lot from his publications.