The Revelations in Context book explains one of the reasons why the missionaries were successful in Ohio:
Parley P. Pratt recorded that the missionaries explained to people that
This Book, which contained these things, was hid in the earth by Moroni, in a hill called by him Cumorah, which hill is now in the state of New York, near the village of Palmyra, in Ontario County. (Autobiography of P.P. Pratt p 56-61)
[For more such references, see http://www.lettervii.com/2016/08/guest-post-one-cumorah-historical.html]
In our day, the historicity of the Book of Mormon is just as important to nonmembers as it was in the early days of the Church. People naturally want to know whether the Book of Mormon relates an actual history, and if so, where the events took place.
Once people have reason to believe in the divine authenticity of the Book of Mormon, they are receptive to its message.
The missionaries to the Lamanites converted around 100 people in Kirtland, but they moved on. The manual notes:
As Parley P. Pratt, Oliver Cowdery, Ziba Peterson, and Peter Whitmer Jr. left Kirtland and moved on to other fields of labor, they left over one hundred converts who had plenty of zeal but little experience or direction. There were no instructional handbooks, no leadership training meetings, no broadcasts of general conference—in fact, there weren’t even very many copies of the Book of Mormon to go around.
Of course, they had printed 5,000 copies in Palmyra. They weren't all bound at once because binding was expensive. Joseph and his contemporaries handed out some of the sheets before the books were bound.
The converts in Ohio didn't have many copies because the four missionaries couldn't carry very many copies with them on their mission. The lesson kind of conflates that problem with the later arrival of Joseph and the others from New York, when they brought the copies with them. They weren't able to sell many copies at first. That's why Martin lost the farm. They had so many available that they didn't print more copies until 1837 in Kirtland.
When I was a freshman at BYU, we were in the 46th Ward. We had a ward hymn based on D&C 46 titled "To Some 'tis Given" that I've never forgotten. Bruce Christensen mentioned our ward in his thoughtful article, here:
It was one of the best hymns I've ever heard, and I wish it was in the hymnbook. Maybe it will be in the new hymnbook?
The chorus goes,
"We'll serve him through
our service to
the least of these,
And in His name
our faith proclaim,
by living one for another."
The music is highly memorable. I can still sing the entire thing, even though I haven't heard it in decades.
D&C 46 discusses the gifts of the Spirit, similar to the way Moroni 10 does.
The introduction to D&C 46 explains the background.
Revelation given through Joseph Smith the Prophet to the Church, at Kirtland, Ohio, March 8, 1831. In this early time of the Church, a unified pattern for the conducting of Church services had not yet developed. However, a custom of admitting only members and earnest investigators to the sacrament meetings and other assemblies of the Church had become somewhat general. This revelation expresses the will of the Lord relative to governing and conducting meetings and His direction on seeking and discerning the gifts of the Spirit.
(Doctrine and Covenants 46, Heading)