The jaw-dropper here is that Beth even tried to get a TRO.
Temporary protective orders (including restraining orders) are generally for time sensitive emergency situations. They are called "ex parte" proceedings because the opposing party is not in front of the judge to defend (usually for safety or out of urgency).
Primarily, you will see TPOs in cases of domestic violence, child custody, stalkers, etc., and NOT in an ongoing IP case where nothing is imminently reaching the market or on the cusp of damaging your brand. The injunctions were appropriate devices for this situation and once denied, the issue should not have been resurrected.
If those earlier claims were actually ruled frivolous (not just unpersuasive), Interplay themselves probably could move for sanctions (see Rule 11 of the Federal Rules of Civil Procedure) rather than wait for the court's own initiative.
The courts rarely do it on their own because they first have to issue a "show cause" order to make the offending party explain their actions. These often require an extra hearing and added delay.
As Brother None pointed out, Interplay might not want to draw attention to the merits of its financing claims. It's possible they would rather watch Beth shoot itself in the foot than push them in the right direction by contesting every bad tactic.
