They can clearly enforce that more
Or, you know, at all...
I see far more Lime bikes sitting in the middle of the pavement than I do parked appropriately. Lime clearly has no incentive to punish bad parkers as all it does is lose them business for zero benefit.
The way to make the cost-benefit analysis work - and therefore to make Lime enforce against bad parkers - is for Lime to face a cost when their riders park badly. Local councils should just drive a van round and impound any Lime bikes thrown in the middle of the pavement and charge Lime £200 a pop to recover them - that would quickly get them to stop renting bikes out to hooligans.