Arc Mainnet, T-minus 2: the testnet's closing numbers

Two days out, we are closing the book on the rehearsal.

What it means

The public testnet opened October 28, 2025. By mid-August 2026 it was processing roughly 13.5 million transactions a week, with contract deployments in the hundreds of thousands weekly and fees averaging $0.004. Behind the public numbers, a private mainnet has been running with 100+ institutional and ecosystem builders — meaning Wednesday is less a maiden voyage than a curtain rising on a stage that has been in dress rehearsal for months.

What the numbers honestly predict, labelled as analysis: testnet load demonstrates the machine works at scale — throughput, fee stability, finality under real traffic. It predicts nothing about demand, because testnet transactions are free, and free usage measures curiosity, not economics.

The figures worth trusting as launch indicators are narrower: fee stability under load, since the $0.004 average held through the heaviest weeks, and the breadth of builders who did the free rehearsal — the population most likely to deploy for real on day three, not day ninety. From Wednesday, the numbers start meaning money: real USDC bridged, real fees, real deployments, and real bridging. The data page flips from countdown to live metrics that morning, and Monday snapshots begin next week.