I think you're missing the fact these issuers don't stick with one scheme. If they are a visa participant, they are also a MasterCard participant. I don't think they'd work hard to poach consumers from other schemes to Visa - what's in it for them other than their portion of the fees?
Visa is only trying to gain more market share by reducing interoperability. And that doesn't go well with everyone.
ISX Price at posting:
$1.07 Sentiment: Hold Disclosure: Held