If your Discord bot gets banned, Discord will not allow your members to be pulled. That's why it's extremely important you take measures like creating bot on alt account.
1. Use an Alternate Account
Using an alt account for your bot significantly reduces the risk of it getting banned. This way, if your main account is deleted or banned, your bot will remain unaffected. Just remember, bot gone, members gone.
2. Your bot doesn't need Administrator
Your bot doesn’t need the "Administrator" permission, and granting it can increase the risk of problems if your server gets falsely reported and banned. The only permissions it needs are "Manage Roles" and "Create Invites".
3. Use an appropriate Name & Profile Picture
Choose a bot name that complies with Discord’s TOS and avoid using a name that directly matches your server name. Do not impersonate other bots to prevent any issues or violations. This also applies to the profile picture.
4. Add your bot to a Discord Team
Add your bot to a team through the Discord Developer Application. This ensures you can still access the bot even if you lose access to your account.
5. Use a different Device and/or IP Address
Using a different device to create your alt account can further reduce risks. If your main account gets terminated and you log into your alt account, Discord may flag it for ban evasion. To avoid this, try using a VPN and an incognito browser to log in to your alt account.
6. Use appropriate terminology in the Verify Message
Using appropriate terminology in your verification embed message inside Discord will help reduce the risk of bot termination or deletion. Phrases like "verify in case of termination" or "verify so we can pull you if our server gets deleted" are not ideal and can increase the risk. Stick to clear, neutral language to avoid raising red flags.