Maybe this is the kind of thing staff does when the campaign has $19 million to play with. Since Trump could invest a $billion, this is rather puny, and that announcement could be another sign of desperation. Rick Tyler, Cruz spokesman apparently has confirmed this. See link at Comment #19.
http://www.aol.com/article/2016/01/29/cruz-has-19m-in-the-bank-top-aide-says/21305011/