Every time a ticket is sold to one of our events, I ask the ticket buyer "how did you hear about our event?" I then send 30% of the ticket price to the person that they heard from.
If a person buys a ticket right now for both the pdc and atc, then that totals $555 as a kickback to you. If you tell folks on your local permaculture mailing lists, and post something on reddit and maybe even seek out a few places to post and manage to sell five tickets, that's $2775. If it took you three hours to do all that, you just made $925 per hour.
Also, if you are interested in exercising this option, then you might be extra, extra keen on making sure our web pages and threads are super polished.