I'm using version 2.2.9 of My Calendar on a site with a smattering of calendar entries (about 7) at present. Since July I am being hit with 500+ Googlebot hits using what appear to be random parameters (e.g. yr up to 2024 in spite of the last event being next spring!).
I notice that this has happened for a different plugin and they have issued a suggested fix (http://support.time.ly/limiting-excessive-google-crawls/). Do you have any similar recommendations as to how to limit the hits without compromising visitor searches?