Basically if you build for yourself you can decrease the cost plus make it bigger, smaller, custom shaped etc.
Megan Note: Pinned because I love the minimalist amount of text and simplicity on each page. I don't think I'd want a long scroll down like she has.
Scrolling Text Display on 8x8 LED Matrix using AVR Microcontroller
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Lovely forest and trees parallax effect as you begin to scroll this launching soon page for the upcoming 'Firewatch' game by Campo Santo.
Build an Arduino (SPI) 7 Bi-color LED Matrix Scrolling Text Display with instructions at Instructables - jollifactory
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OBS How To Add: Now Playing Overlay (Current Song Display - Scrolling Text) | Stream Guides