New vs exited x402 sellers over a chosen window with net entity change - reveals whether the x402 ecosystem is attracting or losing participants, an entry-momentum signal for investors and research...

New vs exited x402 sellers over a chosen window with net entity change - reveals whether the x402 ecosystem is attracting or losing participants, an entry-momentum signal for investors and researchers, from proprietary multi-day snapshots that cannot be reconstructed retroactively. x402 newcomers, x402 new sellers, ecosystem growth, x402 entrants, agent economy momentum, who joined x402