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Yes, I can see they don't have any. What does it mean?

It means that we can trust them with our data or their program as a whole. s stands for secure or security. It is risky to submit personal data on a webpage without the s at the end of http. It could even be a phishing site or scam. Its just a risk.

Ouuu the whole their site is https, only this airdrop os not. So I think we are pretty much safe.

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