I feel that with the current strong approaching, getting common cloth and thread is useless for us that have already upgraded our battle armor to level 3. With the rewards only being medium cloth, advanced cloth and common thread, I think you should incoporate a synthesize function where you can change like foresay 10-15 common cloth into a medium cloth. Along with the cloth this same idea should be applied to thread or just selling to the shop for a mere 10 coins is useless.