Friday the 13th (1980) / Friday the 13th Part 2 (1981) - Newspaper Ad

San Francisco Examiner - November 13, 1981

Seeing that November 13, 1981 was a Friday, there was no way that Paramount would pass on the opportunity to rake in even more cash with a double-header reissue of the first two Friday the 13th movies.

I am sure this re-release made them a fair bit of extra cash that, more the likely, helped power the green lighting of the more or less inevitable Friday the 13th Part III (1982).