Is this normal or what,back from this 15 mins 5-6 promos droped.There already to much promos,is there way to lower that drop rate because it will kill economic on server...

Everyone constantly only looks at the promo announcements and nothing else. At the time of writing less than 0.02% of cards are promos. Keep in mind that not everyone will trade their promos, not everyone will use their promos constantly and in the late game people will get less boosters than now. They are much rarer than everyone thinks from the announcements.

I bet if we were to turn off the announcements everyone would think it is completely fine how rare the promos are.

Thank you for explain :=)

Well unless there is a constant influx of players the economy will be in jeopardy eventually due to the (good) easy ways of acquiring BFP and Boosters, but that's probably not something that wasn't considered before. Let's see what happens, fingers crossed for success