Any experience attracting already existing content creators to your product without paying them?

You could do cold outreach or an exchange, such as offering a trial of the product, but if cost is a concern for working with content creators, you may need to pause for a moment. It's very rare a product or service just gets picked up by content creators without a mutual exchange. If it does, it's either a word-of-mouth diamond in the rough, viral or already attached to a celebrity.