Chargeback & Cost Culture — Week 3 CheckWeek 3 of The Data Platform Bill: cost as governance — the Agoda/Wix lesson that attribution changes behavior faster than optimization.

Agoda attributes platform costs to producing teams IN MONEY, and reports it changed behavior more than technical limits ever did. Why does chargeback work?

Showback (visibility without billing) vs chargeback (actual budget transfer) — the pragmatic sequencing:

The failure mode of a badly-designed chargeback model:

Wix cut platform costs 50% 'without sacrificing performance', pairing engineering work with chargeback culture. The cultural half matters because:

An error-budget-style policy for cost (spend SLO per team, burn triggers review) borrows which idea from the quality cohort?

The 'cost review that actually works' pattern across the corpus: