Every creator program starts as one list. It works fine, right up until the point where you are scrolling to find someone and you have stopped remembering who half of them are. In practice that happens somewhere around thirty creators.
The fix is groups, and the interesting question is not whether to use them but what to divide on. Three schemes cover almost every program worth running.
A YouTube creator and a TikTok creator are not doing the same job. The brief is different, the turnaround is different and the money is usually different. If your campaigns are format-specific, platform groups let you post a bounty that only reaches people who can actually fulfil it.
This pairs with required socials on a bounty. Grouping by platform and requiring that platform means a creator can neither see nor submit to work they are not set up for.
By tier, when budget differs
Tiers are about how much you are willing to pay, not how much you like someone. A tier 1 group might be creators who have delivered three approved pieces and consistently draw an audience. A tier 3 group might be everyone who just joined.
The practical benefit is that you can post the same brief at two prices to two groups and see which converts. That is difficult with a flat list and trivial with tiers.
By intent, when the campaign is a project
Sometimes the group is just the people working on a launch. It exists for six weeks, gets four bounties, and then gets archived. Treating groups as disposable is fine and often better than maintaining a taxonomy nobody updates.
Keep the default group and use it
Every workspace has a default group that holds everyone. Resist the urge to delete it. It is the right target for announcements, for the occasional bounty you genuinely want everybody to see, and for the case where a new creator has joined and you have not decided where they belong yet.
A creator can be in several
Groups are not folders and a creator is not filed in exactly one. Someone can be in YouTube, in tier 1 and in the launch group at once, and will see work posted to any of them. Deduplication is handled for you, so a bounty targeting two overlapping groups does not reach the same person twice.
If you take one thing from this: name groups after what you would search for at the moment you are posting a campaign. You are not building an org chart. You are building the list you wish appeared in the dropdown.