If I knew the answer to this question I would spend a lot less time online.
Not ony does this vary from software to software and program to program, it varies by casino within the program, and promotions for that casino.
Then it varies by the page I place the property on and the placement on the page and space alotted.
It varies between textlinks and banners and size of print and color of banner.
To top that, there are fads among players and what was the best possible combination I found last week may not perform as well next week.
And of course it varies wildly fom site to site.
If the answer to your queston was obvious, our job would be as easy as pie.
We do know this: Programs could not exist if they didn’t convert. Old, established programs are there because they do convert for a good number of people.
But then, new casinos tend to convert very well, players are curious about them. Whether the program lasts is another issue, many go under.
I said I don’t do well with playtech and that is true. Others say they do well with them, even those who bundle and cary over negatives etc. I do revisit with them from time to time. Because like I said above, nothing is static in this business, and what does not work today may work tomorrow and vice versa.