Predictions by themselves don’t determine the ROI or success rate.
Our predictions say what is the “Fair Odd” that bookies should be offering. When their offer is bellow fair odd, we don’t recommend to bet, as in the long run, it won’t be profitable. On the other hand, if the bookie is offering an odd higher than our Fair Odd, this is were we know that in the long run, these bets are will be profitable!
The higher the margin between “bookie odd” and “fair odd”, the higher the ROI, but the number of bets will be smaller.
Dfiferent strategies using our predictions yield different results, and here is our results over 4 years:

https://www.betigolo.com/tips_gold.php
https://www.betigolo.com/tips_silver.php
https://www.betigolo.com/tips_premium.php

Let me know if that answered your question.
Thanks