There is no limit on the number of notes for Notezilla . You can create unlimited sticky notes.
However, we advice you to have about 200-300 notes max in a single memoboard for better performance.
The reason for a limit on notes per memoboard is that we open all the notes at once (because it is a sticky notes app) unlike other programs that show one note at a time.
Watch the below short video for more clarity.