eHarmony is one of the oldest and most recognized names in algorithmic matchmaking, built around compatibility scoring for users seeking long-term relationships rather than casual encounters. Its affiliate program is available through Commission Junction, Awin (for the UK market), and Brandreward, with commission rates that vary by market and network-reported figures range from 20% on CPS conversions to flat $7 to $10 per referred member, with a 45-day cookie window that is notably long compared to most dating programs.

The UK affiliate program through Awin has historically paid up to 35% commission, making the geographic program choice meaningful for publishers who operate in multiple markets. The platform's mainstream brand positioning means it can be promoted in media environments where adult or explicit dating advertising is prohibited, significantly broadening the traffic sources available compared to hookup-oriented programs.

Conversion depends heavily on traffic intent alignment: eHarmony users are actively looking for committed relationships and have demonstrated a willingness to pay for premium membership, which means the program rewards publishers who pre-qualify traffic toward the serious-relationship segment. Broad or undifferentiated adult traffic will underperform. The combination of long cookies, mainstream placement eligibility, and a strong brand makes it a reliable anchor for publishers operating in the relationship-oriented dating category.