The most effective thing the team behind this feature did to drive adoption was to threaten to remove it. More people know about this feature now than ever would have through traditional marketing tactics.
Not sure how much this applies for others, but it's certainly true for me. Social media have tainted the word “trending” for me, so it's not something that I would normally click on when I see it.
[chuckling] I think yes; it seems they got the attention now.