I am surprised too but I think as the fan base has changed over the years, newer patrons of MLB in general and the Indians in particular are waaaaayyyy less invested in the team and the game. Time was MLB clubs derived most of their revenue at the gate and the whole nation was more or less fans to some degree. Today, the World Series gets low TV ratings and a whole lot less casual interest and discussion. People used to (in my experience) track the Series closely and listen on radio or even bring radios or TV's when they couldn't be home, to follow at work. Or call in sick from work to watch the (back in the day) day WS games. In my last few years at work no one talked about the World Series at all that I ever heard.
Today MLB derives a lot of revenue from local and national TV and radio and sells a lot of merchandise, they also have corporate sponsorships in a huge way, sell box seats and corporate ticket packages and the icing on the cake, the massive revenues from the sales and leases of luxury suites and boxes to corporations. A lot of the fans in the stands get their tickets at or through work, or get them from clients or companies wanting to do business with another company. I got offered Dodger and Angel tickets from these types of inducements when I was a purchasing agent. I didn't take them (believe that or don't, your choice; but it is the truth), but plenty of people did and do.
When I was a High School kid or even younger, tickets were dirt cheap (50 CENTS for the bleachers!) and advertising in the old Cleveland Stadium was practically non-existent. Today, I don't know how a high school kid could even afford to go to many games at all. The crowds I noticed at my last MLB games in California were there more as a social event than because they were wrapped up in the fortunes of the team, based on the conversions I overheard and the lack of attention paid to the games and lack of knowledge about the teams. They also seemed to be mostly affluent people. When I went to the Stadium as a kid, there were a lot of working class and poorer people there based on appearances. Also, everyone had a radio and Herb Score's voice could be heard all over the stands and even in the concession lines.
It's a different day and maybe today there are just a lot of very casual fans who just don't care what the team is called. Sad thing, to me at least, that a name in use for 106 years or so could just pass into history and mean so little to Cleveland people.. I don't think "Indians" is offensive and I don't think Chief Wahoo is either. A smiling Indian. What is so terrible? What negative stereotype about "Native Americans" does that serve to perpetuate? It is a different race of people entirely that has had the unfair and negative stereotype of "Grinning like an sweetie" attached to them. And that doesn't come into play at all here.