Name any ethical company and I'm sure there will be questionable actions they did in past with "due to the market conditions" excuse.
Some legal entities are acting all the time in a way we would lock them up in psych ward if they were a natural person. That might be a good way to "succeed" but that's probably something the society shouldn't promote/foster.
In the real world it's not only revenue and profits. That's for sure taking most of the space but people behind the entities are caring about other stuff and takes non-profit-optimal decisions all the time.
It's absurd to attempt to equate two actions completely out of their context to claim that "everyone is unethical sometimes ".
Ethics affect everything we do. If you are doing something deeply unethical, you have way more difficult time finding good employees, for example. Because people don't want to work for scumbags. And the people you find, are likely also unethical and care only about money, how do you think that is going to play out in the long run?
Business and ethics are inseparable. You have to understand ethics to be able to make money - not meaning that you need to be ethical.
The 2nd edition box set was about ~£35 in 1993, adjusted for inflation that would be ~£73 now - which then when converted into CAD is well...alot more than what I just paid for 10th edition (about $80 CAD+tax). So - it's a good deal - and I am sure that there is overlap amongst friends during edition changeover.
5-year cycle would be a happy medium, but "that's just like my opinion man"...