On the other hand, if my workplace was on a list of announced missile targets, I'd stay away.

Assuming that there's no real chance of their enemy setting up a defense in time:

• It reduces probability of civilian causalities (improves their international image, reduces incentives for affected people to join the fight against them)
• If there is some failure in the attack and the center isn't disabled, they still reduced productivity. I'd say indefinitely
• Tactic could theoretically be used to threaten or feint. For example, publicly list five target but only bother bombing three, and you get the benefits of scaring away people at the other two without spending weapons. This could also be used to manipulate enemy logistics, like moving their defenses or response teams to one place and then attacking another.