Star Clicks is against other PTC it has system similar to admailer on admailer you only get commissions on upgrades not commission earned by viewing admailers with a signup bonus for each new referral same for Star Clicks you get commission for signup + referral upgrade but no for referral clicks.Yes but in this way you can get only referrals but not active referrals , better way to get active referrals I think is by creating a good channel on YouTube for that .