Who are you morons? If you don't have problems with your upload speed don't read this.
MAX SENDS has nothing to do with speed, which is why it is a bug.

By increasing max sends to total of 60, you are allowing a receiver to receive more bytes from you on one file. By limiting this number, Invision is putting a cap on the total amount of bytes a receiver will get per file.
Stop arguing you idiots.

And try it. I have done it and experimented with it on various machines. What have you people done other than try to argue without even trying it?
If you are maxing out your bandwidth with ONE SEND, then for the life of me I can't even explain why you waste your time even looking at these instructions. Get a life.
For those who are having bandwidth problems and are not using all of it despite all you have tried, use this trick. The trick is illogical because the final part has nothing to do with speed, yet it is a bug in invision that can increase speed.