I don't think perks work. I'm still selling PCs for around 530.000$ even with a 50% increase. I guess the yellow perk should affect the buying price for new technologies but it doesn't. The videocam technology still costs 1.5 bil $ with 45% in the yellow perk.
They work, try to reset the perks. Also the buy cost only affect products that you already buy the technology, for example: the PC number 34 cost 15.1M but with yellow perk on 2/5 it cost 13.6
This is getting ridiculous ! Stage 53, level 122 and staying alive in the first 3 seconds of the current stage is a matter of luck.. I wonder how much does it go on..
They work, try to reset the perks. Also the buy cost only affect products that you already buy the technology, for example: the PC number 34 cost 15.1M but with yellow perk on 2/5 it cost 13.6