The Colville Examiner 5 August 1916 ran the following, aiming to strike the balance between selling a uke to anyone and warning that it might take a bit of work, really.
The key selling points seem to be
1. The ukulele has had a sudden rise in popularity.
2. A worthwhile instrument if you study it seriously.
3. There are thousands of ukuleles in schools.
4. On US Pacfic Coast the ukulele has become a craze (almost every home in California has one)
5. The ukulele is ideal to accompany the human voice
6. The ukulele is cheap (compared to grand piano).
7. Seller has lots to get rid off, and is willing to help the beginner.
So it was all there at the beginning of the craze.