By Daniel Bates PUBLISHED: 10:29 EST, 6 February 2013 | UPDATED: 10:32 EST, 6 February 2013 'We believe Twitter is valuable to everybody on the planet': Twitter boss Dick Costolo has revealed his plans for global social network domination The chief executive of Twitter has revealed he wants the microblogging site to be as big as Facebook - with one billion users. Dick Costolo reignited the row with his company's most bitter rival by taking aim at the milestone Facebook only reached in October after nine years of operation. Twitter only has 500million users and has been running for seven years.
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Dick Costolo believes 'Twitter is valuable to everyone on the planet'
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His company and Facebook have been fierce rivals since Instagram buyout
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Twitter CEO also tells of his excitement at Vine video service purchase
The Twitter boss did discuss the tit-for-tat scraps with @placeholder that have made their feud bitter and very public.