How public spend reports work

Credits are pegged at 1 credit = $0.01 of list-price AI inference. They are a prepaid balance — non-transferable, and redeemable only for funding projects on FablePool.

• Buying credits: the platform keeps a fixed 20% margin at purchase time; the rest lands in your balance.
• Revenue is the 20% purchase margin plus the list-vs-batch inference difference, which also absorbs token overruns — backers are never asked mid-build for more.
• Funding moves credits from your balance into one project's pool, visible on the project page.
• Funding targets are set by the AI planner, not by users: estimated tokens per milestone, times a safety cushion (currently 2x), priced at list. Targets are estimates, never exact. Project targets must total at least $100.
• A milestone runs when the pool covers its target. Each run records exact input/output token counts in the public build log and decrements the pool by exactly what the run cost — capped at the pool, with overruns absorbed by the platform.
• The ledger is double-entry and append-only: corrections are new entries, never edits. Every transaction balances and no balance can go negative; an automated invariant check enforces this.
• The build log and credit ledger are always public — including on projects whose artifact downloads are backers-only. The money trail is never private.