1 · What we collect — minimal

ChainStudy is a pure static HTML site. As of V1:

• ❌ No user registration, no login, no accounts
• ❌ No email / name / phone / DOB collection
• ❌ No third-party analytics (Adobe / Mixpanel / Plausible etc.) except Google Analytics 4 (G-FGZFV17479) for aggregate page-view stats
• ❌ No Cookie / pixel / fingerprint tracking by us
• ❌ No ad network
• ❌ No chat widget / support popup / comment system
• ❌ No form submissions

2 · Google Analytics 4 (G-FGZFV17479)

We use GA4 in aggregate page-view mode only to know if anyone is reading this. Google may use Cookies as part of this; per Google's policy you have control:

• You can opt out of GA tracking with Google's official browser extension
• We don't see your IP, only aggregate stats by country / browser / referrer
• Google's data handling: see Google Privacy Policy

3 · Server-level automatic logs

The site is hosted on a standard web server. Standard technical logs are kept: IP address, time, requested URL, HTTP status, response size, User-Agent, Referer. Purpose: server ops (diagnostics, abuse detection), security audit, legal compliance. Default retention: 30 days, rolling delete. We don't actively analyze, profile, or sell.

4 · Third-party links

Articles link to:

• OKX (欧易) referral signup (okx.com/join/OK18866) and OKX Wallet (web3.okx.com/join/166888)
• Protocol official docs (uniswap.org, metamask.io, okx.com/web3, etc.)
• Block explorers (etherscan.io, oklink.com, arbiscan.io, etc.)
• Security firm reports (slowmist.com, peckshield.com, etc.)
• Open-source tools (revoke.cash, chainlist.org, etc.)

Clicking a link takes you off-site. Third-party sites have their own privacy policies and data practices outside our control. Read each before visiting.

About the OKX referral link

When you click okx.com/join/OK18866:

• OKX recognizes the referral code OK18866 identifies your visit as coming from this site
• This recognition doesn't transmit any of your personal info from us (we don't have any)
• Only the fact "this visit came via that referral code"
• If you complete signup + trading at OKX, OKX pays us referral compensation
• We can't see who signed up, when, or how much they traded — only OKX's aggregate dashboard ("cumulative referrals", "cumulative compensation")

OKX's full privacy policy: okx.com/privacy-policy.

5 · What we don't use

For clarity, we don't use: Facebook Pixel, Meta Pixel, TikTok Pixel, Twitter Pixel, Hotjar, Crazy Egg, FullStory, Microsoft Clarity, reCAPTCHA, or any CDN-hosted fonts.

6 · Cookies & local storage

We do not set any Cookies or localStorage data ourselves. Google Analytics may set its own cookies as part of its operation — see Google's policy.

7 · Your rights

Since we don't collect personal data ourselves, "data subject rights" typically don't apply to us. If you believe we touch your personal data in any way, you can ask us, request access, request deletion, or complain to your data-protection authority. Email privacy@okexcex.com.

8 · Minors

The site is not directed to under-18s. Crypto / on-chain tools / derivatives involve financial decisions; minors should not access. If you're a guardian who discovers a minor accessing the site, please assist them in leaving.

9 · Modifications

This policy may be updated at any time. Updates post here with new effective date.

10 · Contact

Email privacy@okexcex.com.