(that's nice, I'm set to UK English so they spell optimisation correctly!) But anyway, I got one message in June telling me to trim my filter list, but since then they haven't written. What about everyone else.
I have had the same also. I had it a few months in a row then they stopped, but i did not alter it. I'm not letting ebay and the other junk back on, I have tested and know they should not be there. Another few 100 filters would be nice though, instead of an auto generated message telling me to cut back.
the little things in life... do you feel unloved by not getting that message? if you use the filter you will get that message. that may be the only optimization ( ) message that they have.