The average American is drowning in subscriptions. In fact, more than half of people underestimate the cost of their monthly subscription bill by at least $100, according to a recent survey commissioned by C+R Research. Eliminating these small-but-pernicious fees is simple: unsubscribe. But not all memberships are useless; some can even save you money. Frugal Redditors recently shared what they think are the most worthwhile memberships, some of which will even save you money.