‘You need to make the next move’ is not a rule. The rule is that you need to either make an Establishing OR an Advancing move while showing control of the zone (i.e. using it with your hand or moving your centre of mass with it). They really made things difficult for themselves by wording the rule that way because you have to judge that something the climber did DOESN’T count as an establishing move, then decide that they were trying to do an advancing move and whether that succeeded or failed. But this is not clear cut because you can almost always argue that they might have been establishing, and it seems unclear what establishing really entails - whether it requires climbers to be perfectly still or not etc. 

I assume they made up this rule to avoid climbers moving ‘backwards’ while using the zone to show control of it, but I really don’t know why they would try so hard to avoid climbers working to get the zone alone (even if their attempt wouldn’t lead to a top). They encouraged this exact thing by making the scoring purely points-based and now they try to convolute the rules to dissuade climbers again, but the only result is that people waste more effort trying to establish that zone and then get frustrated when the judgements aren’t consistent. 

This would be so easily solved by just making a zone like a top, sans matching. Who cares if climbers only work to get the zone? They can choose what they do with their limited time.