For as bumbling a mess as the allegations against tOSU and its players have been its important to keep some perspective here. If what has been coming out was true tOSU is culpable for sure for the violations in the first place and then some added because Tressel didn't self report when he found out. They may even get a LOIC rap and somewhere around USC level sanctions depending on how they handle cooperating with investigations. What's more likely though IM(non-expert)O is more players losing eligibility if they were involved along with probation, scholarship reductions, vacated wins, etc on the University side for not self reporting and playing ineligible players... assuming nothing else comes about with cars and other extra benefits or as of yet unsubstantiated point shaving rumors and no other team was doing similar things.
It's slightly different then the USC case in that while it involved more players, it was only one sport that we know of. Whereas USC had Mayo and Bush and both were alleged to have received money from agents. Mayo's case even had runners receive money from coaches along with both having a laundry list of extra benefits from flights and hotel stays to clothes.
It's way, way different then the SMU case, as said above. SMU was paying players, actually funneling the money through the Athletic Department. They got caught, sanctioned and put on probation, yet they continued to do it and promptly got caught again. Theirs was a case where the administration was basically running a professional team. The governor, president of the unversity, AD, and coaches knew they were violating as well as setting up and running the system, recruiting the boosters, and making the payments. Big big difference.
So the death penalty wasn't/isn't really on the table for those (USC and tOSU) cases. Even with the NCAA coming out this spring saying it wanted to get tougher on violators.
It will get a little more complicated if anything actually ever does come of the allegations about Auburn. Especially since they have already had 2 or 3 pay for play infractions since the 80s and had the same booster (who was actually also on their board of trustees until the Alabama senate blocked his appointment last month) allegedly running the program behind the scenes for the last 30 years.
In all the cases it really depends on how deep they can follow the allegations to find proof.