Tradesy only counts withdrawals as revenue, if withdrawals go over $20K they'll send 1099-k. but last time we checked was in Fall. it's better to ask again, they keep changing things.
ETA: any withdrawals, PayPal included. but if you keep money on Tradesy balance, it's not considered as "revenue".
The IRS implements this rule not Tradsey. Wether it's a paypal or any other payment processing site. It's 20k AND over 200 payouts.