When I go to a bakery and buy a roll of bread, some of the money I pay the bakery will be squirreled away for future purchases, improvements to the business, expansions, cover lean times, etc.

That margin is called profit and has been the standard way every single business ever has managed ongoing expenses outside of per-transaction costs forever.

Despite this "Gamble", businesses continue to function every day. Some fail, but that is a purposely designed part of the market. If you cannot forecast your costs and revenue, you are supposed to go out of business.

It's funny that only in the world of Tech, the supposedly magical world where you can do so much with so little and one individual can "Build" something used by millions, that suddenly customers have to bear the burden of the business's inability to forecast costs and profit.

What, do you also expect me to tip you when I download?

Keep in mind that the vast vast majority of software subscriptions do not let you continue using the product you have paid for when your subscription lapses, even when the product gets no more support!