Ripple, Vertcoin and even Doge have larger communities than Monero! ouch.
Not sure why they even use facebook as a metric for monero, a privacy coin shouldn't have a strong facebook presence.
What's paragon coin? They have a ton of likes. Also, vertcoin's stats don't match their rank, though that could be because of an unlisted metric.
Plus... reddit subscribers is somewhat illusionary if the coin was once popular and now isn't so much (Dogecoin for example). Number of users online is a far better metric.
Also IRC stats and other real-time social metrics give a crucial sense of social industry. (Of which Monero is number 2).