Thank your server boosters with a custom message and track every one of them.
A booster pays out of pocket to level up your server, so they deserve more than a pale Discord notice. This system announces their boost with a message you design, grants them roles automatically, thanks them privately, and keeps a record of who boosted, how many times, and for how long.
The boost message publicly rewards whoever boosts your server, encouraging others to do the same. It is sent automatically in your chosen channel with the same flexibility as the welcome editor: text, embed, or modern layout, with booster variables and the boost count.
Saving the channel also points Discord's own system channel at it and enables boost notifications there. The bot then reads Discord's own message to learn how many boosts each member holds, which is what makes the announcement fire on a member's second and third boost too, something the member-update event alone never reports.
Because Discord keeps a single system channel for all of its notifications, the bot leaves boost notifications on and turns the rest off in the server settings: member join messages, their sticker replies, and setup tips. The channel stays about boosts only. The bot's own welcome message is unaffected, since it does not go through the system channel.
Every boost gets its own message with no ceiling, so twenty boosts arriving together from a store produce twenty messages, in the order they arrived. Discord's level-up message is deleted automatically, because the bot works the server level out itself from the boost count and exposes it as {server.boostTier}.
Every booster is stored with their current boosts, all-time total and how long they have supported the server, which powers the boosters list and the {boost.rank} variable, and lets the end message state the exact duration while reward roles are taken back.
The rewards page is what turns thanks into real value: roles granted to every booster and pulled back automatically when they stop, tiers by boost count so someone boosting three times gets more than someone boosting once, and a private thank-you delivered to them alone. Roles carrying staff permissions are refused automatically, so a reward can never become a permissions hole.