imdwalrus: I can kind of see where the outrage of "I GOT RIPPED OFF" is coming from, but so far no one has been able to convince me it makes any sense.
JMich: You have a friend who has a car dealership. So far, he was selling second-hand cars only, but he currently decides to expand on the new car market, going for the new, hip hybrid cars. He strikes some deals with a few companies that he is allowed to sell their new models, and does a bit of publicity about it: "On sale, the 1st of January, the new, energy-efficient Mushroom vehicle, order now and you get 10% off the price". Then, on January first, the company that produces Mushroom decides that it is going to sell the Mushroom for 10% of the normal price itself, while your friend still has to honor the contract of selling it for 100%. Also, the company producing the Mushroom decides to throw in leather seats, a bike and a couple of concert tickets with every purchase.
Would you consider that a dick move or not?
No, because at no point in your hypothetical scenario were you promised to be the only one who sold the hybrid car. The nice thing about capitalism is that you're free to sell your products wherever you want, and do whatever you want with pricing.
(You're also ignoring the fact that GOG gives you plenty of extras with Botanicula that DON'T come with the HIB version.)