You can still profit and coax people into behaving better at the same time. Most stuff you pay for; but have some exclusive things for getting enough good sport points. And to keep up their good behaviour, they will lose points for bad behavior and can have those items taken away from them if they fall below the points needed to have them in the first place.
Or hell; even lose your paid for items. Like taking away a child’s toy if they misbehave. This is basically what a ban is anyway.
My only issue with this is that the only current and reliable way to get these points on your record would be to take the word of other players making reports. You could always get enough friends to circle jerk each other for good guy points, the same way you can bully players now with bad behavior reports.