How many can I invite?
As many as you want. If you refer 10 restaurants who all become customers, your Superb subscription planwill be free.

When does the discount get applied?
When your referral is a paying customer. Then your discount will be applied on your next invoice.

What if the person does not activate my invitation?
Then you don't get a discount. The referral has to register their email through the link they receive.