EventSub WebSockets are now available in open beta

Question on the subscription limits: Does the 3 web sockets/100 ‘enabled subscriptions’ limit imply that you can only have 300 active subscriptions?

So if I wanted to subscribe to stream.online and stream.offline events for a number of channels, would that mean I could only monitor 150 of them (3 * 100 / 2)?

I’m not sure what an ‘enabled subscription’ is and how this relates to max_total_costs, since one code snippet shows a value of 10000 for that.