Affiliate Program for WooCommerce – Gatemi

People send you customers; you pay them a share. A referral link, a ledger you
can explain, and a page in My Account.

A commission is decided once, when the order is placed, and frozen onto it.
The affiliate and the rate are written at that moment and never worked out
again. A plugin that recomputes later has you lowering your rate and silently
shrinking every pending payout in the shop — including for sales made under the
old terms.

Only the goods count, and only a paid order earns. Commission is worked out
on the line items, net of refunds — not on shipping and not on tax, because
paying a share of the VAT is paying the tax authority’s money to an affiliate.

One order is one commission — in the schema. UNIQUE (order_id) is not an
optimisation; it is the guarantee. WooCommerce fires its status hooks more than
once in ordinary operation, and a check-then-insert in PHP loses that race.

An affiliate is never paid for their own order. Checked two ways — the
account that placed it, and the billing address on it.

Also

• An affiliate’s own dashboard on the Affiliate tab of My Account: their link,
  their visits and their figures — and nobody else’s
• A commission is reversed, never deleted, when an order is refunded
• Applications approved by a human, from one screen

What it deliberately does not do

It does not move money. This plugin has no gateway, cannot send anybody
anything, and never asks for a credential that could.

The full edition

Gatemi Affiliates for WooCommerce
is a separate plugin, sold on gatemi.com, that adds a rate for one person,
recorded payouts, a referral window of the length you set, and a link to
your programme terms on the application form. This plugin remembers a
referral for 30 days, credits the first referral, and pays everybody the one
programme rate.

Both editions store their data the same way — the same tables, the same
option, the same cookie and meta keys — so upgrading keeps every affiliate,
every link already handed out and every commission earned.

External services

None. This plugin makes no HTTP request of any kind.