not at all.. 1st there is very few foolish enough ppl that actually would buy it for gems, 2nd you couldnt add those star troop directly to adv like you can with gem bought troops, so you will still need to transport em to adv if u need them.. but all in all it would be a nice thing to do for us, and not to say it would help more the low lvl players which have low population and kill their troops on 1 adventure, this way ppl would be more interested in game.. on lvl 28 you do 1 dark priests and then recook for 2 days as you killed all your troops