ClubTrack offers two types of subscriptions:
Variable subscriptions last for a specified amount of time but don't start on the same date for everyone e.g. membership lasts 6 months and expires after you complete your six months.
Fixed-date yearly subscriptions last for one year and start on a particular date for everyone e.g. membership runs from May through April for everyone.
Tags allow you to categorise your events however you like. You can tag events based on run type, speed, location, or even the weather. Once you tag an event, you can easily filter your events list to only show these events, and use the filters in the attendance exporter to only export attendances for the events you're interested in.