I started playing golf in 1993 and started watching it on television that year too. I don't think I heard the "You Da Man!" shouts that first summer I started watching golf on TV, but I'm pretty sure people started it before Tiger joined the tour, at least by 1995.
This is just a guess, but I'd say that a very signfiicant portion of that increase in tournament ticket sales when Tiger is playing is for tickets for kids.
Even before the infidelity, there were a lot of anti-Tiger people out there. Some of them were probably just being anti-trendy, but although none of them would admit it, their dislike of Tiger seemed to run so deep without other explanation that race had to be a factor - I am sure that if he was blond and blue-eyed, many/most of the Tiger-haters would not have disliked him. The infidelity scandal became a convenient excuse to be more vocally and visably anti-Tiger for some people. The backlash against Tiger for his marital indiscretions was worse than that against any other athlete or celebrity who got caught cheating that I can recall in the past 25 years. Now some of that was because of Tiger's greater fame and popularity with kids, but it can't all be explained by those two factors. Both Shaq and Koby were immensely famous and popular with kids, but a year after their scandals broke, nobody remembered they happened any more and I doubt there was the level of animosity toward them that Tiger continues to receive today more than two years later.