If you ever get these after a contacting customer care, here is how they work:

10/10: ok. No need to reprimand employee

9/10: acceptable every now and then

Anything less than 9/10: talk to employee about their low performance and lacking commitment

This applies to all questions asked, including “how is the weather?” and “did you sleep well tonight?”

So here is how I answer, knowing how it works:

Employee helped me or at least tried to (and was hindered by company bullshit): 10/10, no exception. Yes, I will sacrifice my firstborn on your corporate altar and will build a shrine to your CEO in my bedroom. Of course I will recommend [product] and to anyone and everyone I will ever meet and praise [company] with my dying breath.

Mediocre service: no reply

Truly awful service, employee was a dick: 2-4/10, so it does not look like petty revenge, but is still bad