Did converts of Billy Sunday campaigns ‘stick”?

Three years after the Carthage meetings, a Mattoon, Illinois newspaper said that 80% of Carthage converts were still “living the new life. While two years after Keokuk, 75% of the converts “are still leading the new life.”
– JG-TC: Journal Gazette and Times-Courier (Mattoon, Illinois) · Mon, Mar 19, 1906 · Page 1.

Five years after the Belvidere revival of September 1901, a Belvidere newspaper reported that membership of Belvidere Methodist church in 1901 was 500 persons, and five years later it was 850, showing the ‘stickiness’ of Sunday converts over a long period of time.
– Belvidere Daily Republican (Belvidere, Illinois) · Mon, Mar 26, 1906 · Page 2.