Theoretically speaking if you could predict the algorithm in an online casino wouldn't you be able to predict the game and win a lot let's just say you had access to the algorithm and you were able to replicate it you would practically be able to win all the games
Predicting gambling algorithm is more possible theoretically speaking than in practice. Most of these algorithms are programmed to be totally random and since the possible chances or outcomes are usually very much it is even more difficult to predict it.
In addition to that, online casinos usually have experienced web developers to run checks on their systems from time to time to find and fix vulnerabilities and even algorithms with flaws that would result in totally predictable wins.
Majority of casino games are usually based on luck with random possibilities so finding a flaw or predicting an algorithm is not very practical.