I'm not sure who shared it on Facebook and Twitter, 'cause I'm getting traffic from those domains - or so the referrer information tells me. (That can be faked, but the traffic isn't behaving maliciously.)
I shattered my bandwidth allotment, so I had to upgrade that.
Both yesterday and today had quite large numbers of visitors. As for the rest of the numbers, the site didn't open until like April 15th. So, this has just those numbers.
I've been watching for malicious activity, but nothing is showing up and the traffic seems to be behaving. There aren't any new bots trying to login, nobody appears to be trying to submit spam (more than normal). The site isn't hacked in any way.
I have no idea why there's this much traffic.