What are the fees for crowdfunding?

Can you elaborate on the fees associated with crowdfunding? Are there upfront costs that need to be considered, or are there ongoing fees that are deducted from the funds raised? Is there a standard fee structure across all crowdfunding platforms, or do they vary depending on the type of project or the amount of money being raised? Additionally, are there any hidden fees that investors should be aware of before participating in a crowdfunding campaign? Understanding the costs involved can help potential project creators and investors make informed decisions about whether crowdfunding is the right path for them.