Zano Case Study | closed:in
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Crypto / Web3 Data Engineering List Building

From 17,000 raw domains to 2,253 verified buyers for Zano

Zano is a privacy-focused crypto project that needed to reach online gambling operators accepting cryptocurrency, an audience no data vendor sells. closed:in engineered a custom discovery, qualification and enrichment pipeline that turned a 17,213-domain universe into 2,253 verified decision-maker emails, with a market forecast the build then validated almost to the number.

17,213
Domains screened
5,582
Gambling sites confirmed
2,230
Crypto operators
2,253
Verified emails

An audience that cannot be bought as a list

Zano is a privacy-focused cryptocurrency. To grow real-world usage, the project wanted to be accepted as a payment and deposit option on online gambling platforms, with the strongest fit among privacy-coin friendly and no-KYC operators. That audience is valuable and notoriously hard to reach. There is no clean list to buy.

Three things make this market resistant to normal prospecting. Coverage: operators are scattered across gambling-specific domain extensions but plenty of the best sit on plain .com, .io or .gg, so a single source misses most of them. Qualification: a gambling domain is not proof of an active site, and an active site is not proof it takes crypto, both have to be verified at the page level across thousands of sites. Contactability: even once confirmed, most operators block scrapers and publish no contact data. closed:in's brief was not to run a campaign, it was to engineer the targeting layer itself and hand it over for Zano to run.

A multi-source data engine, built in code

closed:in does not buy a list and hope. For Zano, the entire targeting layer was built from public sources, in code, in five stages, and sized with a TAM analysis before any scraping began.

01
Build the universe (about 17,000 domains)
A broad starting set was assembled from the TLD registry (every domain on .casino, .bet, .poker, .bingo, .games, .win), curated operator and affiliate directories, and a manual seed list. After deduplication: 17,213 domains.
02
Confirm it is actually gambling
Each domain was visited and scanned for gambling signals (betting, wagering, casino, slots, odds). Parked and inactive domains were flagged and dropped, leaving 5,582 confirmed gambling sites.
03
Confirm it accepts crypto
Confirmed sites were re-scanned for crypto signals (Bitcoin, Ethereum, USDT, Monero, no-KYC, anonymous deposit, and Zano itself). After re-verification and a parked-domain filter: 1,791 high-confidence core targets, each scored 1 to 5 on crypto-confidence by keyword depth.
04
Expand beyond gambling TLDs
To catch operators on .com and .io, closed:in fed 100 confirmed targets into Exa's find-similar engine, pulled related sites, deduplicated against the existing 17k, and ran every candidate through the same pipeline. That added 430 more, bringing the final set to 2,230 confirmed crypto operators.
05
Find the people, in Clay
A people lookup per domain surfaced 14,106 employees, filtered to 4,198 decision makers by title. A manual domain-quality review removed wrong matches (a pub, a forum, a press wire, a newspaper, a land-based resort), leaving 3,134 decision makers. An email waterfall validated with Million Verifier and re-checked with Bounceban produced 2,253 verified, deliverable emails.

A targeting asset that could not be bought

The headline is not a reply rate, it is an asset that did not exist before: 2,230 confirmed crypto-gambling operators and 2,253 verified decision-maker emails, distilled from a 17,213-domain universe. What makes it credible is that closed:in sized it first and then hit the number. The TAM run before any scraping predicted 980 to 2,350 priority crypto-accepting platforms, the build found 2,230, at the top of that range. The TAM predicted 70 to 80% email findability, the actual rate was 72%, dead centre. The deliverable was handed over as a structured, two-sheet file, segmented and ready to load straight into Clay and Instantly, with a recommended sequencing plan by crypto-confidence score.

2,230
Confirmed crypto operators
3,134
Decision makers found
2,253
Verified emails delivered
72%
Email findability, matching the TAM forecast

Scope note: closed:in's engagement on Zano was the data engine and handover, not running the outreach. The figures above describe the targeting layer that was built and delivered. This case study exists to show the engineering, in a vertical where the data work is the hard part.

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