I like the exclusive nature of these models, I personally find it exciting when my opponent puts down a rare model on the table. It adds variety, if everyone had them it would be boring. I think it's a great idea to reward people who help to sustain the gaming part of the community, it takes effort and sacrifices to go to events/tournaments so I think unique models are fantastic prize.
If I can offer a suggestion - I think it would be exciting to see another group of unique models offered as prizes for some of Wyrd's competitions, as a way to give exclusive rewards in other aspects of the hobby.
Keep up the good work Wyrd, the community support you guys offer never ceases to amaze me.