Karlos,
I bet the cam went away in momemts of run time not months. The surface of the cam lobe is hardened not the cam. Sad to admit I have watched a lobe go away in <15 min. run time. The real trick is dealing with the nagging question ... what exactly happened so I can stop it from happening again? I can name a dozen possible reasons but can't prove any of them, in the end nobody else can either.
it's the syn. oils fault, too little spring pressure, too much spring pressure, can't put race cam on the street, can't let it idle below 1K rpm, too much valve lash, too little valve lash, soft cam, soft lifter, roller axle failed, improper break in, not machined properly,
oil starvation, EPA outlawed the good hardening process, bad batch of blanks, EPA took additives out of
oil, bad lifter design, particle or crap jammed roller, cheap china junk, YADA YADA