About Alex
Alex Mercer has been analysing online gambling platforms since 2019, with a specific focus on provably fair and crypto-native casinos. After years of watching players lose money on platforms with opaque RNG systems, Alex set out to build a resource that gives gamblers an honest, data-driven picture of where their money is actually safe.
Before entering the gambling review space, Alex worked as a software developer with a background in cryptographic systems — which makes verifying provably fair algorithms a natural part of the review process, not just a checkbox. Every platform featured on DuelBest.click has been tested with real funds, real withdrawals, and real support tickets.
Alex does not recommend platforms he has not personally used. Withdrawal speeds, bonus terms, and game fairness are always verified from a live player account — not taken from press releases.
Areas of Expertise
Provably Fair Verification
Auditing hash chains, server seeds, and client seeds to confirm game integrity.
House Edge Analysis
Calculating real RTP and variance from game rules and payout tables.
Withdrawal Testing
Measuring real withdrawal times across multiple crypto assets and amounts.
Bonus Term Breakdown
Decoding wagering requirements, max bet rules, and game contribution rates.
Licensing & Security
Verifying operator licences, SSL certificates, and fund segregation policies.
Responsible Gambling
Evaluating self-exclusion tools, deposit limits, and player protection frameworks.
Review Methodology
Every casino reviewed on DuelBest.click goes through a structured testing process before any content is published:
- Account registration — testing speed, KYC requirements, and anonymity options
- Real deposit — funding the account with crypto and verifying transaction time
- Provably fair audit — independently verifying at least 50 game rounds per Original title
- Bonus claim — activating the welcome offer and reading the full terms document
- Game sampling — playing slots, live tables, and originals across categories
- Withdrawal test — requesting a payout and recording the exact processing time
- Support contact — submitting a test query to assess response quality and speed
- Scoring — assigning scores across 6 dimensions, averaged into a final rating
Recent Reviews
| Platform | Category | Rating | Reviewed |
|---|---|---|---|
| Duel Casino | Crypto / Provably Fair | 9.4 / 10 | January 2025 |
| Stake.com | Crypto / Sports | 9.1 / 10 | November 2024 |
| Roobet | Crypto / Originals | 8.7 / 10 | October 2024 |
| BC.Game | Crypto / DeFi | 8.5 / 10 | September 2024 |
| Shuffle.com | Crypto / Live | 8.3 / 10 | August 2024 |
DuelBest.click earns a commission when readers sign up at casinos through our links. This never influences scores or recommendations — platforms are rated solely on tested performance. Negative findings are always reported, even for partners. Alex Mercer has full editorial control over all published content.
Get in Touch
Have a question about a review, want to suggest a platform for testing, or need to report inaccurate information? Reach out directly:
Response time: typically within 48 hours on business days.