Betting is a really good way to attract audience. It’s always been a controversial stuff in sport but it certainly works. Take football as an example, a very popular sport. About 1/4-1/3 of my friends would feel losing attention and desire to watch without putting in a bet or two. That’s not a small number.
Regarding table tennis, the problem of match fixing is likely a lot less to worry about than in other sports since the number of bettors and their size are probably going to be relatively small. In big sports, match fixing tend to happen a lot more in unregulated arenas. Take my first country’s football as an example. Betting is illegal by law and the sport a decade ago was well known for match fixing. A lot of top players ruined their careers, being discovered. There was a time when my home team, the best in the country, lost in the final national championships 3 4 years in row and people close to the management team said it was just simply most profitable to go to the final and lose.
so if betting is done in a regulated way, although sound controversial to some, it’s probably a win-win decision for both fans and the commercial viability of the sport.