Speculative theory, or wishful thinking?
Some people may extend the payments like that. But we didn't ask and were not offered the option. There are probably quite a few people who pay in full and are not aware they can extend payments, or prefer not to do it.
You may also be surprised how many people simply finance the purchases, which would not delay closings. If I search for all deeds involving "riviera resort" with DVD as either grantor or grantee (which would exclude resales) since 1/1/2023, I get about 2603 deeds and 1692 mortgages. That's about 65% of deeds that are financed. So yes, some people may have extended payments, but most just finance. Interestingly, that ratio for VGF since 1/1/2023 is lower at about 55% (2835 mortgages out of 5177 deeds), but still indicates the majority of purchases are financed and therefore not delayed closings.