Now you know I am the only one that will answer this..
There have been a few reasons come to light. Some wont sign as if on benefits they dont want to give their full address. They feel as if will be targetted.
It has actually been the captcha though which has caused the biggest problem for some people and is an issue that is being taken further. The govt are pushing for more and more claims etc to be online but there is big problems with accessibility. Pat, along with CEO's of some groups are pushing to get this sorted. Dont quote me as I am not involved in that side of things but if memory serves me right it has something to do with United nations.
The petition is only one part of the ongoing campaigning. There have been visits to both Westminster and Edinburgh with welfare teams. Interviews done, articles in Guardian but, and this just my personal comment, the biggest step forward has been the networking with other individuals, groups.
When approached both Carers UK and PRTC added the details to their e newsletters. This saw a spike in numbers. Yet, although disability charities supported via social media, the bigger ones would not send in their e newsletters.
There is an all day conference in Newcastle next week covering many issues and Pat is one of the speakers. Anything that raises awareness has to be worth doing.
Each person measure success differently. If petition does not reach the target most will say it failed full stop. For me though it has been a learning curve, I have also made some good friends. Contacts have been made for future use too.
Any suggestions you can make Rob, or anyone else, will be taken on board.