After reading your comments and listening closely to your feedback, we agree with you that 20 members is too low, so today we're raising the Pro limit to 100 members.
We believe this increase will meet the needs for the large majority of Pro customers. If 100 is still too low for you, we hope you will consider the Business plan which allows unlimited members and member registration.
We're constantly working to make Weebly better for you every day and carefully listening to your feedback for areas to improve. We really appreciate your support, and can't wait to show you what we're working on next!