Well it is weird but every time I finish the darting mini game it comes up as if I won a battle. It always shows the same score and same opponent and my rank increases to be the same as it already was. The only thing is I get a standard incubator each time as well. This is not a visual glitch either. If there is an incubator slot free then it gets filled by the standard incubator I apparently just won.
Sounds great at first until you realise you’ll never have a free slot for anything else.