But, if it is important to you to have daily housekeeping including having clean sheets, your bed made, clean towels daily, etc, then you would not be happy with renting points. You only get a full cleaning if you stay at least 8 days and that will happen on day 4. If you stay less than 8 days, you will not get a full cleaning and will only get the trash removed and towels replaced on day 4.
If you would like to be able to change your mind, to move your vacation around, to change your location, etc, renting points might not work for you. You are dealing with an individual and they set the rules. If you don't like their rules, you don't need to play. If an emergency comes up and you need to cancel or change the reservation, you may or may not be able to and could lose your entire deposit. Disney will not intervene in these situations.
Just a few of the possible downsides to renting points. It takes a lot of trust between the two parties. Both parties could be winners or losers in the deal.