Snowden admitted that he took the job at NSA to steal documents. He planned it from the beginning.
There is no evidence that he made a meaningful attempt to complain about the legality of the programs. You would think that since he managed to steal 1,700,000 documents that he might have managed to nab a personal email or two to demonstrate that, but no. Why not? Maybe because it never happened and was irrelevant to his plan from the start which was to steal documents.
The surveillance programs were backed by Congress, the President, and some were even subject to the courts. In previous cases that have tested similar questions the courts have accepted them. So who appointed Snowden to overthrow the process of our democratic form of government as well as damage the security of America's allies?
There are a number of interesting parallels between Snowden's case and that of Kim Philby. Both apparently were driven by ideology. Philby was driven by communism. Snowden became disaffected with the US years before he stole the documents, and displays a misinformed and warped view of the Constitution and law of the US. Snowden seems to have something of a martyr complex as well. I have little doubt he quite satisfied with himself.
As to other rewards involving payments, who can tell? We can't exactly see his bank account, can we?
One thing we can note if the growing number of instances of odd actions or statements by Snowden that are suspicious. Why did the Russian government claim to be surprised by Snowden's arrival when he is reported to have stayed for days at the Russian embassy in Hong Kong? How did it happen that a personal friend of Putin that is also on the public committee of the successor agency to the KGB is the lawyer representing Snowden in Russia? Where is the proof that he really tried to file complaints in the NSA? (He can steal Australian plans to bug Indonesian government officials, but not is own emails? Really?) Snowden claims to have been a spy, and yet his job was a system administrator. The list goes on, and on.