I am not quite sure what is going on. Your survey can't work for the above mentioned reasons:
1. A quota that is based on a question on the last page of your survey can't work, because you would need to submit the survey for the system to apply the quota. But once the survey is completed, it is completed. You can't apply the quota anymore. So your question that defines the quota can't be on the last page of your survey. That doesn't make any sense.
2. You need to set a quota, for a quota to be applied...
I have created a working example (moved the hiddenquotaquestion into the first question group) and included a quota of "1". This means the second respondent will get the quota message, which worked fine for me here.
I am currently just testing if hiding the question via GUI works or not (for tests I always show hidden questions, because I want to see if they work).
Once this works I'll upload my example.