Perplexity, a generative AI search engine positioning itself as a competitor to Google, has announced plans to start selling ads despite its initial claim of being free from advertising-driven models. The company recently secured a $73.6 million Series B funding round with notable investors including Jeff Bezos. Perplexity aims to introduce native ads in the related questions section of its platform, which accounts for 40% of its queries. This move marks a significant shift in the company's strategy, reflecting the growing pressure to generate revenue and possibly the need to sustain its operations.