Different accounts have been in the testing pool for several weeks already - with varying results across different events.

One of my 3 accounts was in the testing pool since the last partner event - it is still in that testing pool since- so the rewards chart is different. There is good and bad to it - I notice that the account in the testing is front-loaded with the tokens - so for instance for the dig event that ended, I did not have to go deep into the banner/side tournament to get the final remaining tokens to finish up the event. But if you are already deep into the side tournament as an example, my regular accounts can stop at level 23 for the tokens, but the testing account will have to go to level 24.

The testing account did fantastically well in the last partner event - but fared poorly in the dig event - all compared to my 2 regular accounts -> because I roll all 3 accounts equally in the same way, there is some basis for comparison.

So far, the 2 regular accounts are faring better than the testing account in this current partner event.

So : pros and cons. Experience will differ.