I suggest that if your competitors are using Facebook, you might want to explore the Meta Ads Suite to see what ads are trending in your niche. You can also try searching for your competitors directly within the Meta Ads Suite for more insights.
What you’re noticing is real, off Amazon traffic can quietly shift the entire competitive landscape, especially when brands are consistent with their ads and funnels. Most sellers miss it because manual checking never shows the full picture, and by the time patterns are obvious, the competitors have already scaled. The real advantage comes from tracking offers, creatives, and landing angles systematically instead of reacting late. Are you trying to understand their strategy for inspiration, or looking to counter it with your own off Amazon setup?