I have seen tipsters that are consistently profitable.
Most experts who claim that they know the game inside out and have certainty in the result of each game is lying to you. Most profitable tipsters that I've come across do not proclaim this, but rather place bets on +EV propositions that over time accumulate to a profit of many betting units.
That said, don't go out there and blindly pay for a tipping service. Make sure that they have a verifiable edge and track record first.
Sharing the prediction was the huge thing,because one gambler may learn that experience by doing many games.Even he may loss the huge amount of money in the gambling site,the return gift was the experience from the gambling site.The gambler who had huge experience will do the new one like getting some good tips for sharing experience.The gambler who received the tips must do the accept of giving tips to the experienced gambler.The gamblers who was new to the gambling site can use the tips service by the experienced gambler.They should not ask the experienced gambler to share tips for free until they are very close friends to you.