Immediate distribution, not a 6-month ramp
SEO takes time to compound. Affiliates can start sharing your campaign the same day you list it.
No fixed monthly retainer
An SEO agency gets paid whether your rankings move or not. Commission only charges a flat subscription plus a fee when you fund your Campaign Wallet - and nothing further unless a lead or sale actually happens.
Complementary, not competing
Nothing stops you from doing both - Commission's own product and category pages are themselves built for search visibility.