At one point it says: "during the guarantee period".
Are you sure this didn't apply to the first year only? It makes sense, because operating budget is just estimated, to include a guarantee that early purchased won't be charged more for this first year. But later? It seems wrong that they don't pay MF on points they own.
The language of the Developer Guarantee is the same for every resort, every year. It's identical to what @Sandisw posted.
Others have said DVC uses this annually. I believe @drusba for one follows this and I'm not 100% but it may be that DVC has never or only maybe a couple of times ever had to cover a shortfall. Since they make the budgets that isn't an unlikely thing. Overages are rolled over - into Cap Reserves I think but I'd have to research that to be certain.
Overages are rolled over to capital reserves. The budget statement / annual meeting agenda always contained a resolution to do this, which the board would approve at the meeting. Far as I can tell, it was present in the meeting agenda for all resorts. Language is quoted below. This passage disappeared in 2020 when we all got credits because of Covid. It did not return in 2021.
The audited financial statements--which are not automatically sent to members but available by request--do appear to have some information regarding contributions made by DVC.
(a) Excess Assessments. Any assessments collected by or paid to the Association in excess of operating expenses for the year ended December 31, 2019, shall be set aside for future major repairs and replacements and allocated to capital components as provided by the guidelines established by the Internal Revenue Code under IRC Section 118 and Revenue Rulings 75-370 and 75-371. Such amounts shall be deposited into insured interest-bearing accounts and shall be allocated to the various components at the discretion of the Board.