Actually, introductory pricing can be used in a wide gamut of industries, especially e-commerce, discount retailers, mass product manufacturers, and other businesses. It is often used as a part of a cost-based pricing approach.
In online retail, some examples of introductory pricing are:
Seasonal items sold with large discounts at the start of the season (this is done to let customers try the product).
Android phones are often released at introductory prices – this is the opposite of the skimming strategy exercised by Apple.
Gillette sells its flagship razors cheaper than competitors. However, profit losses are covered by the sales of blades, attachments, and accessories charged as premium ones.
By the way, SaaS businesses also use introductory pricing: they offer free trials and generous discounts for the first period of service usage (typically, 1-12 weeks). After that, customers are more willing to pay the full price of a subscription.