Pages pricing for static React website

Hello. Today, I found out that I can use Cloudflare pages to host static website for free.
I am long term Cloudflare DNS user and I know that there is no catch in there in terms of free DNS and proxying for my websites, but I am not sure why exactly Pages are also free? I am planning to host a static React based website and my question is if the Pages Free tier is really free for unlimited amount of requests in my case?

Thanks!
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