Probably not.
I usually get 10% off whatever the currently reduced price is on their website. Whereas this 13% starts from whatever the original price is. And even for items which don't have specially reduced prices, there's nothing I really want right now just for an extra measly 3% off.
If it were a 20% sale that would be a different story.
So annoyed they didn't have a 20% off on boxing day. I have some pieces for the 20% off sale.