Ok, it's on the website now, as if it is their main bonus.
Here's how it works for miles collectors with the Choice Visa or with a regular Visa. First, Choice Visa:
A $70/night one-night stay earns 700 points, then 1000 bonus points if you use the Choice Visa, then 15 * 70 = 1050 points from the Visa itself. That adds up to 2750 points. Miles are 5:1, so that's 550 miles. Minus 70 miles (assuming you otherwise would have used a mileage-earning Visa/MC/Amex) makes for net 480 miles. Not bad, equivalent to about double miles (tho not as good as the effectively triple miles of the last few months).
Now, regular Visa:
Same 700 points, but now 500 bonus points, and no points from the Visa itself. That adds up to 1200 points, or 240 miles, which is worse than if you chose to earn to miles directly! (And then if your only mileage Visa earns only 1/2 mile per dollar, but otherwise you would have used an MC or Amex that earns 1 mile per dollar, then you're down even further, at 205 miles net!)
So the bottom line is, if you want miles (and are doing short stays), don't bother with this promo unless / until you have a CHOICE Visa!!!