Let me try to explain about this EUMA (End User Monitoring Arrangement) stuff. Any country that sells armaments has (or should have) a concern that those armaments do not get diverted to some shady or illegitimate entity. So EUMAs are built into any arms deal that takes place, from any supplier; be it USA, UK, Germany, France, Sweden or anyone. Conceivably even China may be incorporating it. The only difference is what is the scope of it and how is it enforced. The USA is (deliberately) very agressive about it, that is the difference. For instance, Pakistan has ongoing EUMAs apart from CISMOA and other similar agreements on-going with the USA (as are nearly 90 other countries). India has the EUMA with the US for its US origin arms but has refused to sign the CISMOA and the other pacts with USA. So India is unable to access some US equipment till those get bypassed.
If Pakistan (for example) exports the JF-17 to Yemen (for example again) it will seek a EUMA to ensure that they do not get diverted to Somalia for instance. That would be both valid and prudent.
About the American actions against STANC about sanctions, that is simply the American version of Pax Imperia. Love it or hate; we can't do too much about it in the present dispensation.