I'm not sure that's true. They are only supposed to report on a 1099 if they know it's earned income, not just a transfer. If they're reporting mere
transfers to the IRS, then that's a problem.
That said, based on personal experience, I don't think Venmo is sending 1099s to everyone above that cumulative amount. I do believe they categorize transfers based on personal or commercial use. I expect a 1099 to be issued only for the commercial transfers.