Just crossed 1PB total upload, felt like bragging a bit. I'm sure others who have been at this for years and years would put my numbers to shame, but I was excited to see that 4th digit tick over! :)
My highest ratio on a transfer is on one I had for almost a year and a half and it's 48.44 GiB down to 1.676 TiB up, which amounts to around 490 for ratio. Everybody loves this collection of Linux ISOs, it looks like.