I sent this email:
"Is the doubling feature on your video poker games a true random number
generator, or is it predetermined?
If it's predetermined, is it set to a 0% house edge, or does the doubling have a house edge as well?"
and received this response:
'Thank you for your e-mail.
We use a random number generator. Please click on the link below for
further information.
http://www.32red.com/banking/pwc.php
Have a good night.
Kind regards,
Emma
Player Support Shift Leader
32Red Casino| Dash Casino |32Red Poker
Casinomeister Best Casino 2003, 2004 & 2005 "
Which reassures me somewhat as 32red is quite reputable.