No. They charge a yearly fee for their "nitro" product which offers some perks in any server you're in. Each server can setup their own perks (emoji, reactions l, user name color, etc) for nitro users that join.
You also get sitewide access to emojis/stickers from other servers, for the $2.99/mo Basic plan. For $9.99/mo you get profile customization, HD video streaming, and 500MB uploads.
Decent perks for an eye-watering price, and you don’t even get encrypted messages to boot.