I was at the Isle of Capri, Black Hawk, on March 12. The Isle has .25
single line machines (MG/MD) with 9/6 Jacks or Better, 8/5 Bonus
Poker, 9/7/5 Double Double Bonus, and 9/6 Double Double Bonus,
slant-tops on the main floor in the center towards the buffet side of
the casino. As far as I could tell these machines were set to about
$15.36 coin-in per point (.325% cash back with normal
points--countdown was set to 750 per point, 61 deducted for each
max-coin quarter hand). They also had 15/9/4/4/3 "pseudo NSU" deuces
wild.
There is one .10 / .20 MG/MD 9/6 Bonus Poker Deluxe game in the
upstairs expansion area. It seems to be set to about $14.50 coin-in
per point (roughly .344% cashback). As far as I could tell this was
the only full-pay machine in that area, though I typically only check
.25 and below (I'm a small fry).