Hi Robinppl,
Online participants will be able to take part in the jam, though only participants who pay for tickets will be eligible for the competition and prizes.
The point is to have fun and make a game, but if you want you can get competitive too. The Ludum Dare Jam is on this weekend aswell, it might be a fun thing to try make a game that covers both themes! :D
We will be taking online paticipant submissions and adding them to the jam submissions once voting is complete and the results are in. That way your game will be listed on the jam page with everyone elses.
I hope that answers your question!