CX had carefully worded the requirement as "preference for this programme will be given to HKID holders". But if you dig into the other threads, it's very likely that your application will never be consider if you're not a HKID holder.
My original comment about 1 or 2 classes getting squeezed in was improperly worded. It's exactly like localcadetflyer said, HK Immigration complained about the situation about ab initio (zero experience) iCadet but allowed these already passed the interviews to be placed into the program.