Handling entries collected from comments
Instagram giveaways usually collect entries as comments on a post, which means you'll need to manually gather usernames (or use a separate comment-picker tool to export them) before using a spinner wheel — Spinzelvo doesn't read Instagram directly. Once you have the list, though, spinning it live on a Story or reel adds a visible, hard-to-dispute moment to the announcement.
For extra entries — say, a rule like 'tag two friends for a bonus entry' — duplicate a username once per qualifying action so their odds reflect the actual entry count.