Does eBates usually have a discount code for Yoox? How low/high have they gone and how frequently are they around?
eBates always works with Yoox ... you just need to remember to login at eBates and click through to Yoox. 6% is a limited time double cashback promo; usually it's just 3%. Thing about these double cashback promos is that they're always coy about how long they're running them, so you never know when they're going to expire.