In order to get the Presale Codes, you'll have to RSVP at the specific gig/concert date in the Tour Section of IncubusHQ. Please read this for elaboration: http://incubushq.com/profiles/blogs/presales-and-you
There is no 'fanclub', as the whole of IncubusHQ is a community in of its own. However, there are country/state Groups in the groups section you can join to converse with those living in the same area as you. And that's as "far in" as it goes.
I hope I've answered your question. There are other posts regarding this, and you may want to look through them before posting a new thread in the event you have further queries. You can also always try the Chat section to ask around - always a handful of helpful members in there :) Or send a direct message to one of the moderators. We'll try our best to handle your concerns.
Thank You for Your Interest Julie and Enjoy HQ :)