It's just a helpful technique, not an exact science
The emovie logo is the one with more detail, hence it supports less the small size. Each character is in a separate
box, with a shadow effect around the character, and lots of details that get lost in small size (the film reel perforations)
The other four, take less time and effort to read. The detail on Heritage's logo (the white oval) is unreadable in small size, but the company name can be read inmediately.