There can be a number of reason's why you aren't collecting points when you invite someone. So i will list them for you.
1.You may be cheating by creating fake account's just to get points.
2.The invite link on you're profile doesn't work anymore.
3.The only way to get points for referral's is to use the email invitation's.
4.After using the email invitation's the person who accepted it needs to verify their email before you get points/credit for that Referral.
5.If you followed all the advice i just gave you,you should get you're points.So just be patient and Thank You for inviting new people to enjoy Fubar.
