We A/B test that hero section and selling features didn't perform well so we downplayed them. We've had a lot more signups with other ideas more prominent (Like "Sharing Art Enriches Life"). Believe it or not, the current page is the improved one. I never posted on HN before because I knew I get grilled over how bad our old design was. Maybe I'll get it to "good" status soon......
Edit - I see now the button you refer to. My designer had a nice one that was done properly but it had different text. I made this one to A/B test the current wording, and amazingly it outperformed the original by a wide margin. However, you are correct, we need to see if making the text on that button "correct" (with the current wording) improves things even further.