Rewards are not given to people without a username. You must specify a username before logging in. Then click on the link and log in. You will see that you get points.
This is for those that are connecting or getting their dogs when they're using mobile phones. But for those that have used their telegram accounts through desktop or laptops and you've got usernames already, there's no need to do that. I want to remind everyone here that no referrals are allowed by the forum so please be careful with that. I'm already okay with the amount of dogs that I have got on my account and it seems increasing over time even without invites.