To make an immediate award of costs at the injunction stage is unusual and it is a message from the judge that the defendants should settle the matter ASAP because he has already decided that the actual trial will almost certainly go against them. For them to continue without making a settlement offer to GRZ would be very unwise in the eyes of the court.
By inserting the "jointly or severally" clause, GRZ can recover the full amount from either Endeavour or Rusoro. If one fails to pay their share then the other is up for the full amount.
In other words the matter is virtually concluded but there is the matter of the money already paid to Endeavour by GRZ for "services" when they obviously did not uphold their fiducary duties. GRZ would have a decent chance of getting that back with interest IMO as well as the legals and other out of pocket expenses of mailings, SEC filings etc. If they are smart Rusoro and Endeavour should offer a quick cash settlement to GRZ and avoid the trial completely. It is the cheapest way out for them.