Alternatively, the time saved allows them to move onto other tasks and accomplish more in a day. Saving 30 seconds on a database query can add up to years of time in a large company. It's not that uncommon for hardware engineers to be issued a company credit card, simply for the time saved vs bugging a manager for a purchase order for a $5.00 digikey order.
So much this, if an engineer is paid $50 a hour and it takes 30 seconds to load a prompt. Loading the promt just cost the company 40 cents. If they have to run that promt 3 times a day then it's $500 a year that can be saved by just optimization.
It doesn't work that way though. The company didn't spend an extra $500 that year because an engineer spent 90 seconds each day opening a few prompts. They paid that engineer the same salary as the other case. Maybe the engineer just spent 90 seconds less each day on their phone, or stayed until 5:01:30 that day instead. Or took a shorter lunch. Or only had 6-7 hours of work each day anyway so it didn't make a difference.