Satire. No tradeline was issued on this page.
Tailgate tables offered proof-of-funds as a condiment. One vendor accepted mango, another accepted a screenshot of a screenshot. The official merch stand sold lanyards that said SETTLED and receipts that said PENDING.
The joke writes itself only if you have never watched a real IOU desk. That is why the ops pack on launch.unykorn.org is labeled ops, not credit.