According to a Federal Election Commission document:
> We believe that the service at issue here — assembling a crowd of attendees for a candidacy announcement — provided a benefit to the Trump campaign [footnote 23]. It is not uncommon for campaigns to hire companies or casting agencies like Extra Mile to generate a crowd at an event. In this matter, the available information indicates that the Committee retained Gotham as an event consultant, and Gotham, in turn, subcontracted with Extra Mile to provide extra administrative support at Trump's announcement, including the provision of at least some of the rally crowd [footnote 24].
So, reviewing the evidence, the General Counsel of the Federal Election Commission considers that the claim is true.