Is there a way (even not free) to ensure that my data in IPFS is always available (at least as available as with "traditional hosting services)?
That's a bit of a requirement when building a serious service/website.
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As I understand it, the way is: run an IPFS node (perhaps on a cheap VPS); use `ipfs pin ` to force the node to retain the file even if it isn't being requested.
Presumably someone could sell "pinning as a service" for fairly cheap: a popular file will be widely cached, so the service will rarely need to provide it; and an unpopular file will be rarely requested.
Isn't pinning as a service essentially a CDN?
Is there a reason to believe that such service would be cheaper than a "traditional" CDN?
CAP theorem.
What we're talking about only requires the A and the P.
Perhaps you can elaborate?