This thread is almost 8 years old, so I agree the likelihood of 56k users is slim. But that's not to say there aren't any, and we have visitors in other countries where it's sometimes not as convenient/cheap to have high speed connections. Regardless, it's an additional 5 characters to type in the thread title.
As for the 800px width, you can share whatever size photo you want from Photobucket, etc. From what I’ve seen, the site will usually display it as a 600px width photo, but you can click above for the highres version. Most people have seemed to be happy with that so far. The limit for sharing photos using 6GA's uploader is restrictive, but an admin would have to weigh whether that can be changed.