Except when they paid for development of the Nimr armored car it turned into the highly successful Tigr armored car used by Russian military and police, and exported into many many countries. And when they funded the development of a SHORAD for their needs it produced the Pantsyr with similar results. It's completely plausible that if this turns out to be a cheaper alternative to the Su-57 while still providing decent capabilities the VVS will be interested.If this true, then it's more likely the Project really aim for export market. The UAE usually fund/Invest projects that can provide export market potential. This part of their strategy on getting their Financial Industry more export financing market shares, to make Dubai larger share as financial hub.
This can provide alternative for current Mig 29 users.