I seem to recall the income requirement to attend a MVC presentation at $75K. Some here say $100K. There is no net worth requirement either.
I think maybe I found what you're referring to below. It actually talks about median (I thought maybe it was confused with average). But it doesn't seem like that $1.5M refers to MVC specifically. Seems to include Ritz and St. Regis in there and could include all those with second homes for all we know - it's vague at best...
A strong brand in an industry that caters mostly to wealthy baby boomers
finance.yahoo.com
About Marriott Vacations
Marriott Vacations Worldwide offers vacation ownership, exchange, rental and resort and property management. It was formed in 2011 when Marriott International spun off its timeshare operations.
Today, the company has expanded from three to seven iconic brands that own more than 120 resorts, including The Ritz-Carlton, St. Regis and Grand Residences. Currently, it has around 700,000 owners and 1.6 million international members across 90 countries and territories.
More importantly,
the vacation ownership market serves households with a median net worth of $1.5 million, better FICO scores, higher annual income and has over 40 million potential buyers. In other words, Marriott Vacations focuses on the high-end vacation ownership market, targets affluent customers and owns properties that live up to that standard.