If you would search the net for the best Bingo or Lottery Strategy you would find them anyway. Let us take a brief look at bingo (lotto): someone would advise that "the only true way" to increase your odds at winning is to purchase more tickets. Someone, on the contrary, would advise to purchase less tickets so that the gain was larger. Some people advise to take some tickets but select those where there are as many as possible different numbers. Someone chooses the tickets with a certain numbers locations (square, diagonal etc).
As for the lottery strategies, the situation is even "better", you would find lots of advices from simple to complicated, "mathematically justified". There are free of charge strategies but there are also people selling "lottery winning strategy". These people even write and issue books titled something like "How to win a MILLION playing lotteries" (the word million is in large print, so cheap old decoy trick). Most of lottery strategies are based on the analysis of the results of previous draws.
They take winning numbers of the previous draws count the frequency of winning of the numbers. Then, generally speaking, there are two options: to stake on the winning numbers or to stake on the numbers that have more rare winning results. In the first case the player hopes that the numbers will continue to win more often (such a trend), in the second case the player hopes that the frequency of winning numbers will be normalized and rare numbers will win more often. There are also many other strategies which are more "advanced" and "sophisticated" though there are some people who don't believe in the science and try to use fortunetelling strategy or astrology to guess the winning numbers.
Now it's time to disclose the secret: THERE ARE NO WINNING STRATEGIES IN BINGO GAME OR LOTTERIES! Moreover, no strategy can change mathematical expectation of the game. Your chances to win will not change anyway would you take bingo cards at random or fill in lottery cards or you use any other strategy.
The lotto balls have no memory, in each game they fall in at a random manner. Trying to guess the way they will crop up it is a futility exercise. That's why I call on you not to waste your time for searching and studying the useless strategies. If you like playing and you cherish a hope to win, play but remember that the winning is a matter of luck.
The only possibility the chances of gain to play the games with a larger percentage of payouts. It is easy to calculate the percentage: this is the ratio of paid prize money and tickets that are sold. I.e., the players receive only a half of deposited money (the rest is shared by the organizers, distributors, the state, TV etc). Unfortunately, only in TV lotteries it is easy to know the percentage, in bingo or instant lotteries it is difficult or impossible. I.e., mathematics is the same but there is no information on the prize fund (in instant lotteries) or on collected money (in bingo). Nevertheless, there are approximate estimations of payments: in bingo the payouts make 60-90%, in instant lotteries 50-70%.
As a comparison, in the online casino games the percentage of payouts can be counted, for keno for instance using the combinatorial analysis you can exactly count the payouts. Each casino sets its own series of pay scale choices based on how many numbers drawn match the numbers selected on the ticket and according to the "paytable" selected with regard to the wager amount, they generally vary within the range of 75-95%. In the slots the percentage of payouts generally makes 90-98%, in the roulette 97,3%, in the blackjack and videopoker - 99,5%.
Let me repeat one more time, we don't know the percentage of payouts in bingo (we don't know the number of sold tickets). In principle, playing for many times in the same bingo-room you can count the percentage of payments in the practice. Simply divide gained amounts into spent ones and you will find out the estimate but you should play for a long time so that this estimate come closer to the reality. Generally speaking, if it is possible to find out the percentage of payouts, play where it is the largest and good luck beating online bingos.