The cost of inviting an influencer varies widely based on several factors such as their reach, niche, engagement rate, and the type of content required.

For Web3 influencer marketing:

1. Micro-Influencers: Smaller influencers might charge anywhere from a few hundred to a few thousand dollars per post. They are ideal for targeting niche, engaged audiences.
2. Macro-Influencers: Influencers with larger followings can charge significantly more, often ranging from a few thousand to tens of thousands of dollars per post.
3. Content Type: More complex content, like detailed videos or long-form articles, typically costs more than simple posts or tweets.
4. Campaign Length: A long-term partnership generally requires a higher budget compared to a one-off post.
5. Influencer's Niche Expertise: Influencers with specialized knowledge in areas like DeFi or NFTs might charge premium rates due to their targeted expertise.

Remember, these are general guidelines, and prices can vary based on market demand and the specific influencer's pricing structure.

The cost of inviting an influencer can vary widely, and it's not always about finding the one with the largest following. Effective influencer marketing, especially in the Web3 space, is about finding the right fit for your brand and target audience. This could mean choosing an influencer with a smaller, but more engaged and relevant audience.

To identify the most suitable influencers, services like Growing3 offer data-driven insights, helping you find influencers whose audience demographics, interests, and engagement rates align closely with your project's goals. This approach ensures you're investing in influencers who can deliver the most impactful promotion for your brand, rather than just opting for those with the highest follower counts. For more tailored influencer matching, consider exploring Growing3’s data insight services.