Wat? You need to read the actual text thats available before you say things like this.

We get out conditional green card for 6 years, with the conditions being finishing at least 2 years of college or 2 years in the military. After those 6 years, we get a 10 year GC without those 2 requirements. But we can use those first 6 years towards a citizenship application, if we choose to apply for it. The only difference is that we have to wait an extra year and either go to college or military. It is not a "restricted" GC, it just has conditions.