Amazon Creator Connection Campaigns (for sellers) – tips for success?

I recently launched a creator campaign for my product and I’m still trying to figure out how it all works. In my campaign brief I indicated I have a few free samples that I would send out. In order to qualify for the free sample I requested the creator fill out a short Google form asking them what kind of content they planned to make with the product and where they planned to post. However something I’ve noticed is that some creators who have reached out to me and I’ve sent samples out to haven’t created content or accepted the campaign. Has this happened to you? How do you avoid this?

As mentioned it’s my first creator campaign for my product so any advice, tips, or tricks for having a successful campaign would be greatly appreciated. Thanks!