Unfortunately, that market was much smaller than they thought it would be.
Initially, Lincoln was plotting for a smooth 13,000 units sold in its first year, but it only reached about 10,000 sales. The Mark LT was a bit more popular the following year but took a steady decline after that until its discontinuation.
Some folks out there surely want a pickup truck more focused on luxury than performance, but that doesn’t seem to be the case for most people. But Lincoln has heard the masses—they haven’t tried to produce a new pickup truck since.