[josefonseca]

This widely depends on your geographics.

Writing from Brazil here : still over 70% of the visitors, on average, to most sites I monitor are using some version of IE.

So claiming a "feature" like that down here would be like rejecting 70% customers on a popular mall because they're not wearing red shoes(or some other arbitrary reason).

[jdjb]

Except it's not arbitrary. Each browser they support adds development costs and takes time from their devs.

It is more like choosing not to serve vegan options at a dinner. Sure, it might piss people off but they could always suck it up and just eat the bacon.

[Deestan]

They are not selling the product in Brazil.

[tommorris]

They are on the World Wide Web. If they aren't intending a world wide customer-base, they are missing one of the major features of the web.