It's been like that for a long time! You get a promo code, you can't rate that game! Actually, it's a good thing. The idea is to keep reviews honest and unbiased.
In Germany too. I think this is really good! So many reviews consist only of lies. Example: Promocodes with prize money. 1 x 10 iTunes Card to win = Then hundreds of people in all countries of the world give off opinions which are not true. But as with most things in life, the one side is positive and the other negative. There are always winners and losers. The good guys are mostly the losers, unfortunately. As in this case, here. A developer assigns promo codes without consideration, and users who want to write their honest opinions in a review because they like the app, and to thank him voluntarily, can not do this. This happened to me yesterday.