Hi Gunners,
For the WOT add-on it is a reputation question. At a certain point an interim Helsinki stakeholder that owned WOT at the time sold all user data to the highest bidder. There was quite a scandal about this, when this information became known. In such cases reputation management cannot cure a disaster. In the mean time WOT is back, but it probably will never recover from this 'smear'. Rather a pity as it had an awful lot of good user input before the "beans were spilled" so to say
polonus