Reason
Here is the reason,
The government found out that NOT ALL applicants really DESERVE a green card and since they are very few to offer nowadays, they are separating them into two categories; the majority are deemed NOT TO FIT and the minority is deemed SECURE. In addition most of the applicants in the majority, were found not to know what a green card really is and thus were put into a CONDITIONAL state; once they are given their green card, it will have no photo on it (interim GC)and they will have to pass a yearly exam on IMMIGRATION. At the end of the 5 years and if successful they will be given a green card with a photo. Applicants from MARS are totally EXCLUDED!
Now you figure out!