Your ip address is like a business card. If it is based in El Salvador it is as if it is saying "We love bitcoin".
Let's pump it.
I don't think this is a bad idea, and I'm sure there's no harm in doing it, but how effective is this really going to be? We currently have no idea how much usage will actually increase, or even if they can roll it out successfully. It's also worth noting that USD is also legal tender there, so touting their IP could just as easily say "We love USD."
I'm personally not convinced this can move the needle in a meaningful way, but hey, there should be no harm in going for it.