Well the answer to that is simple - it’s on sale because Blackbox decided to include it.
I’m not sure why people are complaining that developers would have the cheek to reduce their prices occasionally in order to lower costs to customers and entice people to buy that otherwise haven’t… “No please, Mr salesman, I don’t agree with you selling something cheaper, I demand you charge everyone the same price I paid because I feel I’m missing out somehow!”
You’ve not missed out at all… You look at the price of something, if it seems reasonable, you buy it… If it then becomes cheaper the next day, that’s just how life works. Have you never taken advantage of buying something in a sale? And if so, did you feel remorse that you were getting an item cheaper than someone who bought it a day previously would’ve paid? No, of course you didn’t.
Sometimes you win, sometimes you don’t, but in my case I’m not in the slightest bit unhappy that I paid more because I’ve had plenty of extra hours of enjoyment that someone who’s only just picked up the aircraft hasn’t.