The 16x64 (10x38cm) for $49 seems like a pretty decent deal, but only if I’m not married to the no doubt poxy control setup it comes with; sure to be a badly sorted app (possibly containing malware) and a lame remote. What are the odds it employs a standard control protocol which I could connect to an ESP32 or something?
Different resolution etc, but just for the ease of use these look better:
They are designed for chaining together, and you could make a larger display easily enough, though with the leds more spaced out. You could get 10 for about the same price, giving 8x80, 16x40 or 24x24 (using 9)