Under this metaphor, members of a given service can both "shop" for potential relationship partners and "sell" themselves in hopes of finding a successful match.
Still others rely solely on paid membership subscriptions.
Opinions and usage of online dating services also differ widely.
Overall, respondents preferred free sites like Ok Cupid, Tinder and Grindr over paid sites like Match and e Harmony, in part because of the value.
The now infamous infidelity dating site Ashley Madison, which was one of the most expensive, was also the lowest-scoring online dating service, with a score of 37.