We spotted a notice from Energy Transfer, the company building (via its Sunoco Logistics Partners unit) the Mariner East pipeline projects, that seemed odd to us. It was an open season announcement, a time when companies can “sign on the dotted line” to reserve capacity along any of the three pipelines–Mariner East 1 (ME1), Mariner East 2 (ME2), or Mariner East 2X (ME2X). ME1, a repurposed gasoline pipeline built in the 1930s, has been up and running since 2016. ME2 & 2X are due to go online any day now. ME2 and 2X (built side-by-side) are about two years behind schedule. Normally a pipeline company won’t dig one shovelful of dirt or lay an inch of pipeline until/unless customers have already signed up during an open season. And yes, all three pipelines have had open seasons and have signed-up customers eager to use them. So what’s with this new open season? We think we know.