Further to this, they can't offer VIP schemes or bonuses because the UKGC claims that these rewards are “incentives of gambling addiction”.
For example, they are banned from offering in-game bonuses like free spins, gamble spins, and cascade wins. The only downside of these casinos is that they don't hold the UKGC license! However, from another perspective, this is a feature, not a defect! The UK casinos operate under strict rules that prevent them from offering many enticing traits for their players.