Facebook runs periodic purges of bot accounts. If your 500 likes came from compromised accounts that Facebook later deletes, those likes will vanish. You will wake up to see your post drop from 500 likes to 12. Worse, your engagement rate appears negative to the algorithm.
For users seeking to increase engagement, the most effective and safe "feature" provided by the platform itself is Facebook Insights (Meta Business Suite).
Instead of relying on artificial inflation, the platform provides robust tools for organic growth:
A post with 500 likes acts as a magnet. Real users are herd animals. When they see a high like count, they are 400% more likely to read, comment, and add their own like. The auto liker acts as a "seed" for organic growth.