Just a matter of terminology: Instagram filters don't contribute to the uncanny valley--they may make a photo look less accurate, but they don't make the subjects look less like human beings (and therefore don't trigger the revulsion or at least discomfort that is the defining characteristic of the uncanny valley).
Now Snapchat filters, on the other hand... (e.g. the bee filter, shudder)
As a person pushing get off my lawn age, taking selfies feels unseemly even though I know it is entirely mainstream among younger people. One of the things I find interesting about photography is how rapidly the 'uncanny valley' becomes normal. I look at Instagram filters and wonder 'why I would want to make something look like a Polaroid?' It just means the filter is not for me.