From the look at the website Lord has offered, it would seem that there is at least one downside to it. Once you use a extended amount of views on a signature, they stop and ask you to pay for them to keep doing the service. Although it does say the first 10000 is free...but I don't think you want to be paying...especially just to have your signature rotate out.
Just do it the old fashion way and switch them out manually. And you are only allowed to have one signature and that's it.