Welcome to the Zoom Community, @aurasomaacademy.
For registration: You can choose to restrict registration, or leave it open ended.
See this Zoom Support article for information:
https://support.zoom.us/hc/en-us/articles/202835649-Customizing-webinar-registration
See especially this section, where you can restrict the number of registrants:
In the Other options section, configure other webinar registration options:
- Restrict number of registrants: Check this option to restrict the number of people who can register for the webinar. Once the webinar has the specified number of registrants, anyone who tries to register will be notified that the webinar is at capacity.
For attendance: The 1,001st person to attend sees a message that the Webinar is full. If you are also live-streaming, you can optionally include a message about hour to join the livestream. Consider live-streaming for over-capacity situations instead of paying the extra fee just to accommodate 1,010 attendees, for example.
My experience is that a 75% attendance rate is pretty good. Many of the webinars I facilitate for clients get less than that – 50-60% on average. Many people sign up just to get the Recording notice and watch when more convenient.
You could restrict the number to something like 1,200 to be pretty sure that your expected attendance rate of 75% roundly create an overflow-capacity crowd. You might also consider including in your description that “Only the first 1,000 attendees will be able to enter the Webinar; if we reach capacity before you join, please watch the recording video or join the livestream” or something appropriate to your audience.
