One monthly invoice: the $300 base plus the token line, which is the raw model cost Heidi consumed for you plus the 5 percent, itemized. No seat reconciliation, no license audit, no surprises to explain to finance.
The token line is readable, not a black box: what ran, what it cost, what the 5 percent came to. Finance gets a bill that explains itself, which per-seat AI with usage riders rarely manages.
Adding people never changes the bill, which quietly changes behavior: teams invite everyone including contractors and new hires on day one, because inclusion is free and exclusion costs knowledge.