Found this to be a pretty good deal, I just switched over recently and got the Gift card sent to me on the day of service activation (took about a week from sign-up).
Looks like they've recently doubled the referral offer from 3500 points / $50 gift card.
You can combine it with a few other deals going at the moment, namely the bonus Qantas points on sign-up and the Amex statement credit offer.
I intend to use both of these, meaning I'll get 10k QFF points, $100 gift card and $100 credit back.
Can't speak to the quality of this company or the pricing but I'll probably switch out in a few months regardless.
Note: When using the referral system, please check with the referrer that they are still an active member otherwise you will run into issues after signing up.
Cheers
Is it enough to just have the referrers account number? The page you linked to asks for their full name and email address