I order to clarify an old issue ( Why Webroot does not participate in AV Comparatives tests) I sent an email to them and this is the official answer:
Andreas Clementi (AV-Comparatives)
28 Aug, 09:00 CEST
Hi, they did not join the public main-test series. But you can find some results of Webroot inside this report: https://www.av-comparatives.org/wp-content/uploads/2017/03/avc_sp_pcpitstop_201702_en.pdf
So, there is no "joint statement" AV Comparatives -Webroot, as erroneously has been mentioned before.
Best answer by TripleHelix
Just go here and join the discussion: https://community.webroot.com/t5/Techie/Discussion-Antimalware-testing-is-hard-disputing-a-flawed-test/td-p/315336
Many thanks, waiting to hear back now.