strike through is a dark pattern or not

I have been doing some research on dark patterns and I saw some automated chrome tools which are using the dataset of 11k crawl by Mathur et.al (open source) for creating the automation tool.

In one of the chrome browser extension tool, I encountered that it gives an alert even when prices are strikedthrough (also known as crossed text).

Example:  U̶S̶D̶ ̶1̶0̶0̶ : Dark pattern detected: Urgency

Hence I wanted to ask why would this be a dark pattern named Urgency? In the dataset I couldn't find strike through but I wasn't sure why this was given a name as Dark pattern type: Urgency.

By definition dark patterns are manipulative or deceptive designs in user interface, however not all strike through can be deceptive right?