If the NCAA investigated every school that paid for recruiting services, their job would never end. I'm sure CU pays somebody for film on recruits, unless they get it free, and something for nothing doesn't exist except in fairy tales.
This looks to be the crux of the problem for Oregon, if they were paying for film, for scouting, for information, they would be okay. In this case it looks like they paid for access to recruits. They had someone accepting money from them telling recruits that they should go to school at Oregon and this become the issue.
The worst part of all this for Oregon is not that they cheated but that the cheated in such a clumsy manner. The amount of money that Oregon spent and the influence they got for it sounds minescule compared to some of the stuff that has come out of the SEC in the past. I am certain that $25,000 is a petty cash expenditure for some schools. The difference is that they do it in a way that doesn't draw attention, is almost impossible to trace, and leaves them with a high degree of deniability if it ever does come out. Instead of being able to blame a "rouge booster" the Oregon stuff comes back to athletic department funds and approvals.