Your vacation time is worth something to ILG (formerly Interval Leisure Group). The timeshare exchange broker offers services to some 2 million member-property owners. Its primary Interval Network is an exchange program that lets owners trade their timeshare intervals for accommodations at more than 2,900 resorts in approximately 80 countries. In addition, the company provides exchange services to owners at timeshare properties managed by vacation services subsidiary Trading Places International (TPI), while its Preferred Residences is a luxury branded membership program with Preferred Hotel Group. The company also provides resort management services.