And Axelwolf, you have been pressing me for some of the exact numbers as far as rollover, and bonus that I have received. I have been reluctant to post them as I don't think it a great idea to do so. But I will risk it and share what I got this week.
I recently cashed out at one of my books as the cycle I started in September at the start of football had ended (meaning I hit the rollover amount and cashed out). The public offers on their site were crap, so I didn't rush to take a new offer. Then I got an email from my "host" offering me 200% bonus at 20 times rollover, which is there public offer. Since the bonus is in free play it is only worth half of what says, so 100%, not 200%. And 20 times rollover counting full bonus and initial deposit just is too much rollover.
So I answered telling him that. So he replied with how about 120% bonus with 5x rollover. I accepted. It is not hugely +EV for me, but if I go .500 on betting games, losing 4.5% juice, I will make about 10% of my original wager. But I can and have been doing a lot better than -4.5%. Half juice Fridays for football, betting dogs and away teams +points results in only a 1-2% loss rather than 4.5% according to 20 years worth of Shackleford data. Playing on the right side of some key numbers +/-7, +/- 3 in football further reduces. I have pace numbers I use in basketball. All told I can get that expected cost down to 1.5% (average longterm) and show a 44% return on my original investment. And occasionally, I might run above .500 for a cycle and show a really spectacular return on investment.
It is all about longetrm results and return, just as it is with all advantage play.