Who benefits (or what exist) cdn servers?

Question

CDN

Hello!
We are talking about the cdn server of libraries, such as jquery, bootstrap, foundation, etc.
I wonder what is the general benefit for their creators, because they are free, they help reduce the load from the site, while the whole blow falls on them, they also need to be purchased / maintained / paid for electricity and the Internet.
If everything is clear with the libraries themselves - they are Open Source and the product is not material, you can afford to write a library and give it to the community, then with the servers it’s not clear at all: is it such a hardware open source chtol?
Who benefits?

Answer 1

if you look carefully, it turns out that these services are not provided from scratch, but by companies that already have a built cdn infrastructure and cut coupons on this.
a question from the series: "what's the fun of gihabu hosting faux free projects" or "what's the fun of jetbrains distributing free licenses for students and open source", etc.

Answer 2

The plan of the evil genius
+ We make the Internet more accessible, better and faster, including through the use of CDN
+ ...
+ the user sees our ads faster
(Google's evil laugh)
And it can also be an ad for a service providing CDN services, like you tried it, you want more - pay. Well, and various other things.

Answer 3

You can sell different statistics (sometimes it is expensive).
And especially malicious ones will carry out targeted attacks, for example, some bank or service will connect your CDN to their website, then you can hack any user's account and no one will notice *.

Answer 4

Big brother is watching you :D It is cdn that in most cases gives statistics to advertising networks 9 take also Google search engine) For example today I looked at the phone in an online store (Germany) today Russian VK turns my phones. Clearing cookies, etc. Does not help.