Let’s say world of warcraft costs $1000 to run. It generates $2000 in profit. It’s stable and has not grown from this. This leaves you $1000 to save/invest into products.
If you cut it down to maintenance mode, this number will drop significantly. It may not all be immediately, but it will definitely drop. Let’s say the cost drops by 60% and the revenue by 40%. So the cost is $400 and the profit $1200, that leaves you with now only $800 to invest.
You now have less money to invest, and your company is less financially secure in the case that the next project is not successful.
Your lemonade analogy still isn’t accurate because there IS demand for lemonde in this case (Wo), a huge demand. If lemonade has stable sales, that pay your bills, you don’t stop selling lemonade just because Slushies became popular. You just take some of that lemonade revenue and add slushies to the menu.