payments entities zoom in value. should GoI take 49% UPI public and monetize it?

if stripe = $95 billion, square = $110 billion, and paypal = $280 billion, then what is the market value of UPI?

keep 51% to ensure that UPI data sits in india and is secured. 

i've never quite understood why there should be NUEs to compete with UPI, if the latter is part-privatized and ceases to get special treatment from GoI.