Not the best way to frame your offer if you're looking to attract serious users. Consider doing some A/B testing with different price points and incentives. Also, your landing page URL looks a bit off. Make sure it matches your branding.

Influencer collabs. I cannot stress this enough. Find some sustainability-focused influencers and send them a sample. If they vibe with it, their followers will swamp you. Also, go hard on Instagram. It's visual, it's trendy, and you’ll get a lot of eco-conscious eyeballs there.