What Creator Outreach Actually Costs
The commission is the small cost. The hours are the real one, and they are the same whether the creator works out or not.

The cost of creator outreach is not the commission. It is the hours. Sending samples, waiting for a reply, chasing a post that never comes, and starting again. That time is the real price, and it is paid whether or not the partnership works.
The visible costs are the small ones
The sample, the shipping, the commission: all visible, all budgeted. Add them up and they are a fraction of what you spend. The line item that never gets written down is the afternoon spent on ten creators who never reply.
The cost of picking wrong
A bad pick is expensive twice: the sample you will not get back, and the hours you spent on someone who could not have sold your product. A good pick costs the same hours and returns a partnership. The outreach itself is cheap. The wrong creator is not.
Where the cost actually sits
The cost sits in the vetting you did or did not do. Ten minutes checking what a creator sells and who buys it filters out half the list before you spend a shipping label. That is the cheapest hour in the whole process, and skipping it is what makes outreach feel expensive.