Don't worry, they'll still earn money on the parts. But don't forget the repairs and maintenance in Russia was done by repair plants of the air force, or state, some of these are now independent or JSC companies. To the aircraft builder or design bureau, it doesn't matter much I guess if it's done in Russia or abroad under proper license. However when HAL starts upgrading it on its own, and then tries to sell the upgrade, Sukhoi/Irkut might not support it (as MiG and Mil did with Eastern Europe programs).
Mexico didn't want Flankers to shoot down drug runners. It has a strategical requirement to protect its oil fields. Who knows how the balance of power will shift in the region in the future.
I've heard the same, but they really abandoned the plan due to budget constraints, ie the Navy doesnt get enough funding for such a thing. So I doubt Hornets would be bought in the near future. Yes, well, think about what I said about strategic and balance of power....maybe that's why they didn't look at the US? On the other hand, the US can't really deny Flankers to be sold to Mexico since they have no US parts, they only can offer a better solution...which may be the Hornets, possible in a barter deal, but I haven't seen anything firm on it yet. Just like with the Flankers, I'll say it again, I'll believe it when I see a contract or better yet, a delivery.
By the way, Gripen was the runner up in the competition. But something with more range was needed.