US operators led the charge in passive infrastructure sales some years ago, and now one of them may be back for more. Verizon is said to be considering a tower sale of up to $3 billion. We have not seen infrastructure-related activity from the US on this scale for some time. It is also notable that in May, Verizon agreed an innovative profit-sharing model with infraco Vertical Bridges on a tower building project. Verizon is exploring the possibility of selling between 5,000 and 6,000 towers, valued at $3 billion, according to reports. Most of the towers in the US are already owned and run on a wholesale basis by the country’s large towercos, namely American Tower, Crown Castle and SBA Communications. While…