Welcome to the forum Ronria :)
If you haven't signed up for IF Magic yet, you can try calling the organisers and ask if they will let you sign up under the singapore magic circle group booking and still get the 10% off.
The official closing date for IF Magic is actually over but if you are lucky, they still might let you register. See the details
here.Many of us are going to be at IF Magic, do say hi if you find any of us :)
For the Gala dinner, i think it's more of a networking event for people with commercial interest in magic. Either that or you are a hugh fan and want to go around asking for autographs :)
I wouldn't be able to say if it's worth it because I've never been to one. Maybe someone who has can tell you.
Hope to meet you at some outings sometime :)
Cheers