I thought it's time to dig up this unconscious horse and start beating it again. Actually, this is what made me do it:
http://store.steampowered.com/sale/2017_best_sellers/
I'm not sure KSP was in it last year, but I assume they were at one point. But by now KSP has positively dropped out of Steam's top 100 list. If you're complaining on how Squad dare to charge money for content, here's your answer: without money there likely won't be any content. It surely isn't coming in large amounts from the sales of the game anymore, and developers don't like to work for free.
Most of us know this, but for those who expect Squad to develop new things without you paying for it: wake up.