> IIRC from some resarch I did, a decent card provider will reject a magstripe transaction from a terminal with EMV capability if a card is known to also be EMV

> IIRC from some resarch I did, a decent card provider will reject a magstripe transaction from a terminal with EMV capability if a card is known to also be EMV capable... At least, it could in theory. That's how it works for all countries other than the US. In the US EMV capable terminals are not common so transactions in the US are typically permitted no matter if magstripe or EMV. This is why starting with October this year the US are finally making the switch to EMV and once that roll-out is complete, magstripe transactions could (theoretically) be either disabled or severely limited. For instance you might have to confirm a magstripe transaction with a text message.