User friendly feature:
Possibility to connect two or more hubs together in a way as hublink works with mainchat but only for downloading, so user sending search requests will be able to get response and download a file from a hub that is linked.
Hubowner would have a possibility to link two or more hubs of his own choice where users would have a possibility to connect to each other without being in the same hub. More sources = more search results. It would be nice to control it somehow (optional, as in other hubsofts where user is allowed in a hub but can download only when meets additional hub settings), lets say that hubsoft would check a user with previously specified restriction that hubowner will set up in a hubsoft ( so in practice, user in “hub 1” will be allowed to download from a user in “hub 2” if he's sharing 200Gb with 10 slots open etc.). Some monitoring will be needed in GUI/hubcommands - like traffic statistics from linked hubs to control any problem with lag in a hub or any host's problems with internet connection etc.