Change email interstitial copy and opacity

[beccaklam]

Users are stopping at PNI's email interstitial and not clicking through to see results. We're hoping that changing the copy (to allude to the results on the next page) and lowering the opacity of the interstitial background will help fix this problem. @caltrider to provide copy and @beccaklam will draw up the design comp.

[beccaklam]

Copy from Jen: https://docs.google.com/document/d/1MhA6TSJ-Gg8FW6q5y5hhTJ_UsfnV0T6ablZwhkwG0Vg/edit#

[beccaklam]

First draft of designs with Jen's copy here in this redpen: https://redpen.io/p/yh131112029e4f1b2e
@caltrider @kristinashu I think I'm leaning more toward the black versions because it looks more different than the regular screens of the creep-o-meter? Makes it feel more distinctly like an interstitial?

[beccaklam]

Closing this ticket as I've opened a master ticket for the product page: #3904