How the online casino industry works

Three layers

When you open a casino app on your phone, three distinct parties are usually involved. The operator holds the UK Gambling Commission licence, runs the website or app, handles your account, and applies responsible gambling rules. The game provider builds the actual slot, table or live-dealer product you play. The platform supplier (often invisible to players) connects the lobby to dozens of providers through a single integration.

A brand like 10Bet might display games from Evolution, Pragmatic Play and NetEnt in the same lobby, but those studios remain separate companies with their own testing certificates. The operator chooses which providers to contract with — which is why two UK-licensed sites can feel quite different despite sharing the same regulator.

Game providers

Studios such as Evolution dominate live dealer, streaming real tables from dedicated studios with trained croupiers. Pragmatic Play and NetEnt focus heavily on slots, releasing new titles monthly with varied volatility and feature mechanics. Playtech spans both slots and live products and powers several white-label casino platforms used by multiple operators.

Each game carries a published RTP (return to player) percentage set by the provider and verified by independent testing labs like eCOGRA or iTech Labs. The operator cannot alter that maths — they can only choose which games to stock and where to place them in the lobby.

UK regulation

Any company offering gambling to customers in Great Britain must hold a UKGC licence. The Commission sets standards for fairness testing, anti-money laundering checks, advertising rules, and mandatory safer gambling tools. Licensed operators must participate in GamStop and display BeGambleAware messaging prominently.

Unlicensed sites targeting UK players operate illegally. Reel Opinion Book only compares operators we can verify hold an active UKGC licence — that check is the first criterion on every scorecard we publish.

Affiliate marketing

Comparison sites like ours sit outside the operator–provider relationship. We earn commission when readers visit an operator through our links, which funds the research behind pages like this one. Operators also pay affiliates directly — it is a standard acquisition channel alongside television and sponsorship, though UK advertising rules restrict how bonuses can be promoted.

Mobile shift

The industry has moved heavily toward mobile play over the past decade. Native apps and responsive mobile sites now account for the majority of sessions at most UK operators. That shift influenced how lobbies are designed — larger touch targets, simplified navigation, and game tiles optimised for portrait screens rather than desktop monitors.