Most probably this happened because you requested your payment to an invalid account.Kindly submit a support ticket for further assisstance.
The minimum payout for Payeer and PerfectMoney is $2.In order to receive your payment request you must wait up to 7 business days.
Yes,you need to click at least 4 ads in order to earn from your referrals the next day.
No,you do not have to invest in order to get paid.
In order to find your referral link you have to go to your account and then on the left menu click on "Banners".There you will find everything you need in order to promote your referral link and get direct referrals.
You have to deactivate adblock from your browser settings.