I mean CDNs (content delivery networks) are pretty much agreed help performance by serving static content close to the end user. https://stevesouders.com/examples/rules.php
And you'd be surprised how much bot traffic that most sites get that you may or may not want to allow. Not every user feels comfortable setting up Let's Encrypt (though I agree it's awesome) or even has sufficient privileges to do so.
Compared to other services like AWS Cloudfront/WAF/etc., Fastly, Akamai, etc. IMO their offerings are quite powerful and economical.
And you'd be surprised how much bot traffic that most sites get that you may or may not want to allow. Not every user feels comfortable setting up Let's Encrypt (though I agree it's awesome) or even has sufficient privileges to do so.
Compared to other services like AWS Cloudfront/WAF/etc., Fastly, Akamai, etc. IMO their offerings are quite powerful and economical.
https://www.cloudflare.com/plans/#overview