I have questions to ask for a free membership. Is Cloudflare completely free? How many domains can we use for free accounts? Or is it unlimited? Is there a time period for a free account? For example, the first 3 months free to use, at the end of 3 months, paid membership is mandatory?
Free is completely free forever. For as many domains as you can add to your account.
Paid plans just get you more features: