Deletion of 10 year challenge

Comment: and revisit in three months or so. Already meets . Too premature to make crystal ball predictions of whether or not this will have lasting notability. See also: 
Stance: keep
Cited policy: Wikipedia:Notability (WP:GNG||WP:RAPID)

Comment: isn't currently |notable and should either be deleted or merged to Facebook#2015–present:_Combating_fake_news_and_other_ventures
Stance: delete
Cited policy: Wikipedia:Notability (WP:NOTE)