Can I use the mobile referral to order the home internet?

Yes you can do and it will count

The answer is Yes !!
We love Fizz !

yep, should work

Yes it would work but you get only one referral per account not by product

As long as you're a new customer, you can earn the new customer referral credit whether you sign-up for mobile or internet plan.

You can't use your own referral. But if it's from someone else then it doesn't matter whether that person has internet of mobile. The referral code isn't tied to one's plan.

Yes you can do that ! If anyone needs a referral code, here is mine : 98IDK !