It's when you mostly live without a car but occasionally need one for transportation and day trips. You usually can rent them by the hour or day and as you said

It's when you mostly live without a car but occasionally need one for transportation and day trips. You usually can rent them by the hour or day and as you said it's a slightly different user experience than traditional car rental agencies. I know some people who use public transport / (e-)bikes exclusively but every once in a while want to visit a relative out in the wood or make a bigger purchases which would be hard to transport otherwise (some of them also own a cargo trailer for their bikes). It's not a majority by any means but for some people it work They would have to maintain and store a basically unused car otherwise.