JDA is an investment company. They invest their shareholders money; or their own; because they are speculating that they will see a profit. If they don't see a profit, they will put pressure on the company they have invested in (JJP) to maximize profit. Such as cut corners, use cheaper parts, don't pay such high salaries for talent and workers, etc.. This could be a bad move for JJP if they end up not being able to serve up profits for those involved.
On the other hand, it could be the move they need to compete with Stern on an equal footing. The influx of cash would allow them to expand and streamline their pinball machine output and possibly get into other areas as well.
I wish JJP the best of luck in this new phase they are going through.