[andrewla]

From looking at articles around this, the data looks like this:

    Museum budget          $  305M
    Admissions(current)    $   43M
    City Energy Subsidy    $   15M
    City General Subsidy   $   11M

    Expected windfall      $   ~6M
    City General Subsidy   $    8M

The new subsidy will apparently decline on a sliding scale as the admissions income increases, to a minimum of $8M from the current subsidy of $11M.

So the gain here is very small -- ~1% of the operating budget, but this is clearly a "foot-in-the-door" move.