I'd like to scale my reputation by π, but I get an error complaining that it's not valid.
Please add support for this - π is supported in other places on the site after all:
See the red banner. (emphasis mine)
The value must be a positive integer between 1 and 10
It doesn't however specify that the number be real, so I would fully expect complex numbers to be supported. This should allow you to make your Imaginary Internet Points actually have an imaginary numeric value.