gexDataSale privacy

Applies to the gexDataSale web app (repository name gexDataSale): a static site on Vercel that sells one-time downloads of historical intraday options gamma-exposure (GEX) datasets, served by an API on our own server. The site’s footer and its /privacy page link here. Datasets are not on sale yet; this notice describes the app as built.

This service is operated by llab08, Hong Kong, and these terms are governed by the laws of Hong Kong. The section below explains this product’s data handling and current availability.

Summary

No accounts and no sign-in. No ads, no advertising SDK and, as of the date below, no analytics or other third-party script. If a future version adds a cookie-less analytics script, this section is updated first.

Purchases

Payment runs on Stripe Checkout. Card details are entered on Stripe’s page and never touch our servers. We keep an order record: the symbol, date range and file format you chose, the Stripe checkout-session and payment identifiers, an order id and the e-mail address you enter at checkout. The e-mail address and order id are kept so that re-download links can be issued and honoured; the order id is also printed on the Stripe receipt. Write to the address below to have an order record deleted; a deleted order can no longer be re-downloaded.

Free samples and rate limiting

One free sample per network address: we store a salted hash of your IP address, never the address itself, to enforce that limit and to rate-limit requests. The salt is a server secret; changing it clears the ledger.

Downloads

Generated files are stored temporarily in Cloudflare R2 behind time-limited links and expire automatically; a paid file is regenerated from the order id on request.

Hosting and logs

The site runs on Vercel; the API and its database run on our own server. Hosts may keep short access logs (request path, time, status, hashed client address); we do not use them to identify anyone.

Children

The service is not directed at children under 13 and does not knowingly collect personal data from them.

Contact: hello@llab08.com · Updated 7 September 2026 · All privacy notices