Buy and play on SlabTrack
You're a customer. This manual explains how the games work, how the math favors you (or doesn't), how provably-fair lets you verify outcomes weren't rigged, and what your rights are around shipping and refunds.
Where you can buy
| Where | What you do | What you get |
|---|---|---|
| thisorthat.slabtrack.io | Play Flip or Pull games | A card. Always. The price varies by outcome. |
storefront.slabtrack.io/[shop] | Buy a specific card direct | The exact card you clicked. Fixed price. |
The two games
Flip
You pay a price between win price and lose price for a chosen card. A SHA-256 random outcome decides which price you actually pay. You always get the card — but a "win" means you paid less than market, and a "lose" means you paid more.
Pull
You see 2-5 cards, all with the same fixed price (less than the average value of the stack). You pay → server picks ONE card to ship you. You don't know which one until after the reveal.
How fairness works
Every Flip outcome and every Pull pick uses a server-generated random seed. Before you play, we publish the SHA-256 hash of that seed on Solana. After the play, we reveal the seed. You can recompute the SHA-256 yourself and verify it matches what we anchored on-chain. We can't change the seed after you saw the hash. Full explanation here.
What you should expect
- Always-shipping — there is no "you bought nothing" outcome. Every game results in a card going to your address.
- Stripe-secured — every payment goes through Stripe. If we vanish tomorrow, you can dispute the charge with your card issuer.
- Tracking — within 24-48 hours of purchase you'll get a USPS tracking number by email.
- Refund rights — see Shipping + Returns
Sections in this manual
- How Flip Works — math, examples, what to expect
- How Pull Works — math, the stack, why it's better than blind packs
- Provably Fair — the seed, the hash, how to verify
- Shipping + Returns — when it ships, what happens if it's damaged, refund rights