Eh, I personally think efforts should be spent on other endeavors. Thinking otherwise just seems pretty selfish/I need to be special imho.
Looks like they are already thinking of other tiers though.
it cost an hour of time for 1 person to create a few ideas. then another 1/2 to 1 hour to decide if they're added in and where. then 2-5 hours to get some good concept art approved. i'd say at best 7-8 man hours for 5-20 rewards. now the art can be sub contracted (which happens regularly) so the loss is much lower than what i have provided.
and they can release tiers as they're finished or major content patches so they aren't all given at once.
And then you consider the hours and hours spent to implement the rewards. Even a simple cloak takes a long time to implement. Pets? Yikes.
And all of those hours are spent into some arbitrary exclusivity? What a waste of time.