I have not followed every thread and post on this topic, but let me put on the hat from David's perspective for a second.
I think the moves he is trying to implement in reaction to all this mess is to salvage the business the best they can and to minimize their losses and risk of future losses. David's business I assume has been doing great up until this pandemic. Up until this mess, both owners and renters I think have been generally very pleased with the service provided - I know I have always been happy in the past when I used his service.
So I ask, what reason does he have to screw all that up and potentially lose a business that has taken years to build and gained quite a bit of credibility. Again, I am assuming good here, and believe that he is trying to "fix" the situation between (i) paying owners everything contractually agreed upon and (ii) ensuring collections from renters in an amount equal to or greater than what he contractually owes the owners - all in an environment where many renters are seeking to cancel and or default on rental commitments. Then you layer on the complexity of trying to satisfy both owners and renters through re-rentals and vouchers and extra $2 per point, etc, etc, and it has the makings of confusing and alienating a lot of people and also causing both owners and renters to think that David is screwing them - again, something I cannot conclude given the business that was built.
Unfortunately, this is one of those rare, lose/lose/lose situations. I don't think David's business was at all equipped to handle what is happening and the "fixes" seem to not be effective, but based on what I see, there has been an attempt to try to solve the issue for owners, renters and yes, David's business risk. Maybe I am naive, but I am just trying to think of this from a logical business/financial perspective - the thing I don't account for is greed, fraud, lack of compassion, etc, which in my opinion, is not the situation we have.
I feel bad for everyone involved. It certainly as not been the happiest situation in the world and not an easy one to fix without proper planning.