[sutra_on]

You do realize you are on a tech forum?

>Having a live product is a full time job even if you change a single line of a code once in a while.

I have launched dozens of products and changing a single line of code once in a while is definitely not a full time job. Honestly, this makes no sense.

> They abandoned their products once the growth stopped

This is obviously false (take basically any popular app with a single license and look through their update log). Your stated reason -- fixing bugs or updating API usage for existing products -- should not require a subscription. Maybe it's an old school assumption, but I expect single line bug fixes to be included in the initial cost.

If this was an incredibly complex project that required years of research and development I could see some logic behind your argument. However, linking to a 50 line code snippet as your inspiration and explaining that you faced some challenges when building the production app does not look serious.