The co-defendant in the the Tulisa Contostavlos trial has also walked free after the judge decided the case against him could not proceed.
Rapper Michael Coombs, whose stage name is Mike GLC, had pleaded guilty before the trial to supplying half a gram of cocaine to undercover reporter Mazher Mahmood.
On hearing the decision the 36-year-old reportedly wept and hugged his defence barrister, Jeremy Dein QC.
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Solicitors acting for 20 of the families said they were "appalled to see the shambles in South Yorkshire Police" following the inquest.
The two men are accused of meeting with Mohamed Abrini and giving him money.
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