[givan]

In some cases, not supporting IE is like a filter, if you offer a web service that involves some web tech background from users then it will save you some support hours, people that don't understand basic stuff like what a browser is can be a pain for support or probably would never signup either.

[bartj3]

True, and that is probably the case for Paydirt, but there's a difference between not supporting and actively blocking. Less than 2% of Paydirt's visitors use IE, so dropping support is a logical choice. Maybe even display a warning to IE users but don't block them.

[chris_wot]

You haven't given an actual reason why they shouldn't block IE users. Could you explain why that is?