HEdeserved $30k-10%.
The company was so grateful that they gave him a $1,500 reward. The writer who interviewed the guy could tell he was clearly disappointed with their reward, and said, in retrospect, that he wished he hadn't called them. The guy was unemployed, and had been for some time. The story ended by saying the guy's wife had left him. Sometimes it's better to just keep the cash.
I would never expect to be rewarded for returning something that didn’t belong to me. No matter the contents, just finding the owner & seeing their relief at recovering the lost item is payback.