Now, I just don't understand why nobody has said anything yet. The delta is just way too big and oil far too valuable a resource for stuff like this to go unnoticed for as long as it has.
Granted, I understand that India is kind of on its own geopolitically and part of their strategic interests might be securing a closer tie with Russia (for whatever reason), and this might be a bribe-in-kind of some sort, but still, I am quite confused as to how this has gone under the radar for as long as it has.