For all the probing by members of the Public Accounts Committee around RTÉ’s barter account, the nature and operation of the outsourced facility for in-kind commercial deals remains shrouded in mystery.  We know the following from the initial Grant Thornton report published on Tuesday. The author of the report said he had heard from RTÉ commercial director Geraldine O’Leary that: “A number of deals are posted in this account. For example, a company may pay for their advertising into this account. If a company pays for their advertising into the barter account, 50 per cent of the total advertising revenue…