Okay, so first of all, Tenfingers is wildly different compared to IPFS or say Filecoin, it's another underlying paradigm.

There are no "hashes", the nodes are trust-less, and everything is encrypted.

Which means that if you have the link to a data, you can retrieve it, and decrypt it. If you don't have the link you cannot do either.

The link is not a hash like in IPFS but a small collection of information, like how to connect to the nodes, encryption key etc.

So, in order:

If you have a bot net, you don't need tenfingers to control it. But sure, you could I guess, like you could control a lamp with it. A normal web server can do the same thing ofc.

Yes you can use the data for communications, that is actually the idea behind the protocol. You can have a web page that "communicates" with other people for example, by you updating it when you want to communicate something. You can even share links to other webpages shared with tenfingers, and they can link back to you.

I hope that explains it, but just to be a bit more precise, there are no hashes, instead the IP:ports are used (several if you overshare) so that the link only knows exactly who to call (and that's all secured so you can't just randomly try to get random data).

Hope it helps, it is a quite different system, so please say if there is something unclear!