A prediction for gambling based on chance can only be given by a prophet. Can such an "expert" be a prophet? This is unlikely. Forecasts make sense only when the element of chance in the event (game) does not exceed 50%, and the forecast of the result is based on facts and calculations, the weight of which for the outcome of the event is above 50%.
Even the soothsayers may not accurately predict games all the times. If not their visitors would consists mostly of gamblers who are in search of solutions. Generally, the gaming niche is not supposed to reach this length of inviting a prophet to forecast competitions. Wouldn't it cost the player extra money to consult the powers of spiritual eyes?