Which Special Reward works best?

[tingloking]

What makes a Great Special Reward for BackerClub members?

I am a backer myself and recently a creator in Kickstarter for a bathtub gadget called TubKeeper (https://kck.st/2xLbNMK). We want to offer some special reward for BackerClub members and we really that to be something that is attractive, from the member’s POV. We see there’s no post discussing about this (or did we miss it?).

I wonder what kind of special reward in BackerClub really gets the interest from members.

Here’s our guesstimate, rank by popularity:

A. EB pricing even when sold out
B. Discount on any pledge
C. A free or discounted add on
D. Free upgrade to next tier
E. Chance to get a gift card

Thanks in advance.