HP has a really active community! I'm not sure what type of metrics you're wondering about, but there are usually between 20 and 40 people online at any given time, and there are ~1 million page views per month. I don't actively track how many daily users there are (especially because people having multiple accounts makes this difficult), but it looks like there were 1085 accounts online in the past 24 hours.
I don't share specific financial information, but HP makes enough for me to live on from upgrades, cash shop sales, and advertising.