Sex dating website
Online dating services allow users to become "members" by creating a profile and uploading personal information including (but not limited to) age, gender, sexual orientation, location, and appearance.
Paid members can freely message, start discussion thread, no daily limit of discussion board entries. Members only see intersection of what they are looking for and what other members are looking for. Free messaging and status posting for undergraduates (5 messages/day limit).
Others utilize the freemium revenue model, offering free registration and use, with optional, paid, premium services.
Opinions and usage of online dating services also differ widely.
Online dating services also differ widely in their revenue streams.
Some sites are completely free and depend on advertising for revenue.