I do the crafting leves all the time even if they don't give me marks. I'm in the 20 range with all my crafts and I only do those and don't take the 25 so there is not a lot to pick from. Maybe I've just been unlucky I just haven't seen any in a long time. I didn't make it clear because I didn't know what to say but its not since the last update it was the update since they put the marks at the city guilds so I'm talking months that I haven't seen them. But again maybe its because I only can do the 20 leves and sometimes they don't even have those listed so the random might make it a very low rate to find and I just have been unlucky on the days I do them.