Currently safe bets are far from being guaranteed, since there are certain risks that you should be aware of before making them:
Restrictions and limitations on bets
Most bookmakers set limits on the maximum amount of your bet, while one may accept €500, another may not accept more than €100. This can pose problems when trying to place a safe bet: suppose you plan to bet €500 on page 1 and then €500 on page 2, but once you have placed your bet on website 1 and are about to place the bet on web 2, you receive the information that you cannot bet such an amount.
Arbitraging your bets often requires you to bet large amounts to make a profit, so if a bookmaker doesn't allow you to do so, your safe bet can be thwarted. It is also possible that the bookmaker will restrict your bets individually, and a restriction will be applied without prior notice.
Invalid bet
Sometimes you will find on certain betting websites odds that stand out compared to those of other websites, a case that logically you will have to try to take advantage of doing arbitration. But that is not without problems, since if you make a bet on certain odds, the house may withdraw your bet later, considering that the odds are wrong. You should know that bookmakers have the power to invalidate a bet.
Therefore, if you bet on odds that are subsequently found to be incorrect, it is possible that the betting site will retain your winnings.
Changing odds
Another inconvenience that can arise when it comes to getting a safe bet is that the odds change. It is very common for bookmakers to adjust their odds in a matter of seconds, making the possibility of making a safe bet available for a very short time. Going back to the previous example, if you make the €100 bet on page 1 and then go to website 2 to bet another €100, the odds may have changed in that short period of time and cause your safe bet to vanish - your You had already bet €100 and from one moment to another you lose the opportunity to secure some profits, so in this case you will only have to try to minimize your losses.