Actually, GP is correct and you are missing the point. If the software was open source, you, or Russia, or anyone could use it to make a CLONE. That STILL would not solve the issue of LinkedIn not storing the collected data in Russia. You cannot force a large corporation to move their ALREADY EXISTING data to another country simply by forking their open source software and making some changes.
The issue Russia seems to have is they want the DATA inside Russia, presumably because they want unfettered access to it. Open sourcing the software absolutely will not "solve" that for them.