The plural form, which matters more than it sounds. Someone searching for a single event types the name of the event. Someone searching for the category types the plural, and that person is browsing rather than booking, which is exactly the visitor a listings business wants.
Technology conferences run into the thousands every year across every subfield, and there’s no authoritative place to see them all. Attendees pick badly, sponsors allocate blind, and speakers submit into a void. A directory with reviews, dates, locations, and call-for-papers deadlines would be used constantly and monetises through sponsorship, ticketing affiliate revenue, and organiser listings.
The name states all of that in two words with no hyphen, on the .com, in the plural form that signals a collection rather than a single event.
It also works as a defensive holding beside the singular for anyone building in the space and wanting both.
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