Inside of the industry and Feature and company menus, add an option to indicate no data on that menu.

[Kevin Costello]

Not every user in the Marketo data has an industry.
So as an example, inside of the Industry drop down have an option such as

• "No Industry" or "None" to search for users who do not have an industry.

Do something similar for the Company menu and for the Feature menu.
Then when the above is done, have the map check all the checkboxes on load and reset.