No, this is strictly a exchange between parking users within the same building.
No, there is no limit to the amount of exchanges in Parking Exchange.
You need the approval of your strata/HOA/building manager before using Parking Exchange.
No, you do not transact when using this application. It would be an amenity within the building just like when you use your pool or gym in your building.
This is likely to result in a permanent ban from the platform and fines imposed by strata/HOA for the offending party.