UPDATE!!
I have been working with them as an affiliate for more than 3 months. I was performing well and made a lot of sales and generated over $4500. But the Digistore24 blocked my money (almost $1200) and disabled all my affiliate links. They said that fraudulent transactions detected. My payouts have been blocked as their system detected high risk in my account.
I have been used legitimate paid traffic and sent enough proofs for my traffic source. My other networks are happy with the quality of traffic and never missed any single payment with them.
On other hand, Digistore24 have delayed payment system, they used to sent me payment after 2 days from payout schedule and their support system really sucks. If you're lucky, they will reply your email within 48 hours with premade email and never answer to your question so you will waste 96 hours if you ask question again.
I am completely disappointed with Digistore24 and I will bever recommend this to professional marketer.