Tiny Layout Objects

I’m using Base Elements to identify errors in my file (which I did not create). Several layouts contain vey small text fields (1 x 1) that are broken links. They’re usually in the top left of the layout but some are randomly placed. They don’t seem to have any triggers. Regardless, I suspect they were at one time used to track usage of the layout. Is there any other use for these small fields?

I used 1x1 fields when commands required fields be present on the layout to function. Replace was one of those commands. Insert still requires them.