Well, I didn't expect the EBC Greenstuff to crack only after 5000 kms (even without track usage). Went back to the workshop to get them replaced... unfortunately the shop didn't have any more new EBCs for my car, so they replaced the pads with a new set F.O.C. (Brand: CAM - No idea, haven't heard of this brand, but what the heck, needed to use the car.)
So far the replacements are working well, no complaints.
The EBC pad is the one marked by the red arrow. (It's black in colour because the shop sprayed it with paint)