I was not aware of the full documentation, that is interesting. I was judging from news sources like these(
) that China was apparently "miffed" at some clauses of the deal(or so the media claims). Inflation is also a factor in raising prices, And China really keeps Russia in it's proper place. The Russians do have manipulative practices in many of their deals with everyone(selling used aircraft to Algeria after receiving payment for new hoping they won't notice, hooking Indians on by selling low-priced Kiev-class(older class) carrier then raising the price 4x, doubling the prices of "MKI" Indians are so proud of, etc).
The main question over here is, would Russia really allow RD-93 sales to countries where the JF-17 would compete with Russian aircraft in the local market? According to senior officials like Mikhael Pogosyan, it would be in Russia's interest to prevent JF-17. He has said it's performance is "extremely close" to MiG-29, but price is comparatively less. Given how JF-17 is compatible with the same weapons suite the J-10 has, and weapons like SD-10B can actually fire before getting in range of Russia's R-77 so it is deadlier(-B variant is said to have a range of 100+ km, R-77 does not - also, China is spending alot more in this, and other areas), and can compete with Russia in many of the same markets Russia historically sells to.
Rightnow, Russia does have leverage over the aircraft's sales due to the engines. Many countries have expressed some degree of interest about the JF-17, an Indonesian Minister talked about this aircraft's performance capability roughly at par with older F-16s, even the Turkish Prime Minister mentioned the JF-17(Turkey is considering joining the F/A-50 Korean-American project, Korea's arrangement with USA enforces that F/A-50's performance will not exceed Korea's KF-16s). Pakistani AF officials have talked about up to 8 countries having expressed interest in the aircraft, some even sending their pilots to test-fly the aircraft.
I believe the RD-93 engine would be a problem in some of those sales.