Leon Hill, chief executive of uSocial, said that his firm did not deal with Jackson directly, but with a member of the Jackson family.
"I can't admit that we dealt with Michael Jackson directly, though we were in touch with someone in his family recently who tasked us with conducting a Twitter campaign on an account relating to him.
"For obvious reasons we'll be dealing with his family from here on in, though it would have been great to conduct services for Michael Jackson in a different time, under different circumstances."
, which values a follower's worth at US10c (6p), , ranging from 1000 to 100,000, to brands that want to boost their Twitter connections.
The firm claims it finds users who will be interested in hearing from the brand by tracking and working out what users are interested in to match profiles. It then invites the users to begin to follow the brand, meaning only users interested in the brand will respond.
has close to 30,000 followers, however it has only three tweets, which have all been written after his death on June 25.
If this account became Jackson's official Twitter account before he died, it seems unlikely that he would have needed to "buy" followers, given his immense popularity across the world.
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