Ads in the blockchain has been developed by CraigsCoin. Why don't you add it to the BlockNet?
Maybe. I don't know...
That doesn't sound like a good idea though. A blockchain is not the sort of thing to store content. Imagine the bloat!
Content should be indexed in the blockchain and stored, encrypted, on the local storage accessible to multiple nodes in such a way that not even the nodes know what they're storing.
Only text is stored. Bloat becomes an issue as a long-term solution, however the tech is already there. Why develop new from scratch if you can develop the existing one?
Good question, but it's not one I can answer since I'm not XC's dev and I also know nothing about Craigscoin. There are innumerable variables that could affect such a decision.
Will you ask the Craigscoin people to consider joining the Blocknet?