The 1-1/8 age started in the early 90s. Far more bikes from then and forward came with 1-1/8 than 1". There was a span of time (c. 1991 - 1995) where 1-1/8" threaded steerers were the norm. Up until the late 90s, many bikes were available with either suspension or rigid fork, and the suspension forks were all short travel so generally speaking, a rigid fork wouldn't be a terrible fit.
Note the comment from the vendor you posted specifically referenced a long-travel freeride or DH bike (a 'Big Hit') not a run-of-the-mill hardtail with a 50 or 75mm travel fork.