Well there is an excuse. All the people lucky enough to be drawn out have been entered into some sort of system to enable them to buy. The system will then generate an email.
The people who haven't been drawn out presumably haven't been entered into any system. You'd have to enter everyone into the system for everyone to get an email and why should they do that?
I realise people are disappointed, as I am, but just grow a pair instead of whining like a spoiled kid whose parents won't get them the toy they wanted.