Live stream, error 429

I’m getting websocket error, restarting connection: server rejected WebSocket connection: HTTP 429, having just updated to a paid subscription to the v2 api.

Shouldn’t the API be ‘unlimited’ (now that I’m paid), and so I should be able to subscribe to an arbitrary number of tickers? Or are aspects of the v2 API still limited, even once you’ve upgraded to a paid subscription?