That's smart. It's probably different for short stories, but with novels, "free exposure" is usually problematic unless it's done right. (I'm launching a novel in '23.)

In principle, the ideal price at launch is $0, insofar as you never want price to be an issue for any reader, and you hope to set off an exponential word-of-mouth phenomenon that renders the first few days or weeks of sales irrelevant by comparison. The problem is that, empirically, you don't get the same quality of readers (as measured by likeliness to read, likeliness to finish, likeliness to review, likeliness to write a fair review, and likeliness to write a useful review) with free giveaways as you do when people buy it.

The S-Tier strat might be to give the book away for free while somehow finding a way to command the psychological investment that people would have in a book if they had paid $30 for it.