Many bookmakers accept bets not only on traditional sports, but also on e-sports. To be successful in betting, it is important to be well versed in the chosen sport, and esports is no exception. Predicting the results of matches without basic knowledge is not worth it - you can simply lose money. You need to understand the intricacies of the discipline, be aware of the teams' form and their latest results.
They bet on eSports as ordinary spectators who do this for the sake of interest and just root for their favorite team, as well as professionals in their field. The latter can make very good money on this.
If you think that your level of competence is high enough, you should try to bet small amounts. To begin with, you can choose matches with a predictable outcome: sometimes very strong teams meet newcomers in tournaments, and then the result is almost obvious. If you succeed and you remain in the black, then you can continue to predict other results.
In the end, everyone chooses for himself whether or not he should bet on eSports. Be prepared for the fact that you will fail and you will lose some amount. And if, on the contrary, you managed to earn a good amount and more than once, then this can be considered a full-fledged means of earning.
Of course, they are considered, and by the way, I think it's not even bad. This is probably still not worth considering as the main type of earnings, but as an additional one, I think it is not very bad. By the way, usually I personally watch all the results of the matches here and based on this I already place bets - it is very convenient to analyze the capabilities of certain teams.