Measurement protocol hit REFUND has no effect for revenue

Question

I want to ask you why, when I send REFUND hit to analytics (analytics registered this hit), I see no effect to revenues. When I send refund, revenues should be lower.

Request: https://www.google-analytics.com/collect?v=1&t=event&tid={MY_UA_ID}&cid=fc2e0dee-5e15-4ae4-8374-cb89542d1c39&ec=Ecommerce&ea=Refund&ni=1&pa=refund&ti=583874

Revenues are still same as before hit.

Answer 1

The refund hit to Analytics has no influence on the revenue but increases the Refund Amount value.