That reminded me of this: https://youtu.be/Ni1RPc5OU2c

But why if the customer didn’t need any support and didn’t cause any cost on your side? In B2B you are often mostly paying for the actual customer support, no?

How is it fair to not need any support and then have to pay for past months of smooth operation to get (security?) updates?

Edit: I get that further development and keeping products secure isn’t free, but why not make it e.g. a 6/12 month subscription then? That way you can’t just pay for a single month to get your issue resolved/software updated but also don’t need to pay for the past.

The Bitcoin network initially went online in 2009. Was your friend a time traveller?