Commissions: $20 CPA for paying users, $0.20 CPA for FREE users.
Grammarly.com is one of the absolutely most popular websites in the world. They offer a great product suitable for writers, content marketers, students, and basically anyone that needs to write exceptionally well.
I only kind of wish that it would be less popular so one could gain an advantage using this service, instead of as it is now it is more of a required addon than a bonus for writers without an exceptional writing skill. Even then it can be a great tool for spotting the occasional writing error.
Anyways I am really happy to share that they offer very good commission rates which kind of surprised me. $20 CPA for paying customers and $0.20 for free users. Top affiliates can qualify for even higher commission rates.
They even have a $25 signup bonus and 90-day cookies.
Main markets: Worldwide, but is only available for English.