Simplify the following text for a Grade 13 native English-speaking person.
Original: Conventions , clubs , and fanzines were the dominant form of fan activity , or `` fanac '' , for decades , until the Internet facilitated communication among a much larger population of interested people .
Simplified: Conventions , clubs , and fanzines were the main fan activities , or `` fanac '' , for decades , until the Internet improved communication among a much larger population of interested people .