They provide all the ranked ballots at the link. I was curious how the 2nd place votes for ballots that ranked Amash 1st broke down, in the unlikely case that he decided to drop out (since he only has an exploratory committee after all). They were:
Gray: 25
Jorgensen: 23
Hornberger: 9
Supreme: 8
Monds: 4
Robb: 4
NOTA: 4
Behrman: 3
Vohra: 2
Kokesh: 1
That means that without Amash, we would have a first round like:
Jorgensen: 67
Hornberger: 65
Gray: 43
Supreme: 30
Kokesh: 20
Monds: 17
That would be a much tighter race.
Huh. I guess they choose Gray because he was an elected official and they like elected officials (see Amash, Johnson)? Hornberger seems to have less chance than I thought (even without Amash).
