The best of CPM Networks mostly with no minimum requirements and low payouts. Also clean banner ads with no redirects or pop ups. Almost in all these networks there is a choice, if you want a clean banners or you want also pop ups - personally I like this possibility. Ordered in no particular order.
1. Fidelity Media
- Banner, Mobile, Pop-up, Pop-under
- No minimum requirements
- Minimum payment: 5$
- 5$ for referrals (after 10 000 impressions)
- Fast support
2. HeroCPM
- Banner, Pop-up, Pop-under
- No minimum requirements
- Minimum payment: 5$
- 5-20% from referrals
- Fast support
3. CPMLeader
- Check the rates on their sites to find out if it would be good fit for your site
- Banner
- No minimum requirements
- Minimum payment: 5$
- 15% from referrals (35% from advertisers)
You're allowed to post referral links as long as you post some info about the site you're promoting - how much you can earn, minimum payout, your experience etc.