This is a test of commonsense with single/multi-choices. Complete the next sentence:

How to spot a timeshare scam
Understand the timeshare concept.
When you buy a timeshare you are purchasing the right to use a unit at a hotel, condo, or other resort property. Timeshares can take many forms.

Choose from: --A timeshare is one you purchase for a fee of $60 per month. It gives you 30 free hours per month. --Typically they involve purchasing the right to use a vacation property for a given week once a year on an ongoing basis. It may involve a point system, whereby timeshare participants earn additional vacation opportunities in the normal course of timeshare use. --Some are free, some cost more and some are heavily discounted. Those who bought the timeshare are most likely to pay an additional fee. --Some timeshares will take only one or two rooms, while others can take up to seven or 10 rooms. Typically, timeshares are meant for the convenience of the individual or to surprise a guest or two.
The answer is:
Typically they involve purchasing the right to use a vacation property for a given week once a year on an ongoing basis. It may involve a point system, whereby timeshare participants earn additional vacation opportunities in the normal course of timeshare use.