When you add the "Software and IT" AI filter on top of that, it's expanding your search to ~30k because the AI has analyzed company websites and classified additional companies as being in software/IT - even if they don't explicitly mention "saas" in their product descriptions. So you're getting companies that Clay's AI identified as software/IT businesses based on what's on their websites, not just the ones that happen to use the word "saas" when describing themselves.