"We took Disney's total attendance and divided it by each park's individual attendance. From that, we found the percentage that each park contributed and then multiplied that by the total revenue (15.1 billion). With that, we were able to estimate the amount of money each park brought in!"
One of the problems in this calculation is that it assumes that guests spend the same amount of money in each park. Also, it does not consider the revenue earned from any of the resorts. However, without official stats from Disney it's completely impossible to calculate park to park earning comparisons.
Yeah, there really is no way to fully determine what each park makes, but this way seems as accurate as any. When comparing these numbers to numbers I found in an article that was dated a few years ago, the numbers on this site are very fair and very similar to those which has been reported by "a source" at the time.
While these numbers may not be 100% accurate, I appreciate the way the creator went about finding them.
The analysis is flawed in that Disney does not own Tokyo Disneyland or Tokyo Disney Sea. Both of those parks are owned by the Oriental Land Company. Yes, both of those parks pay royalties to Disney but the revenue per guest is lower. Also the Parks and Resorts segment of Disney also includes the Disney Cruise Line. You would also need to include the numbers of passengers into the total attendance and then allocate some of the total revenue to DCL.
Also, TWDC does not own Hong Kong DL (they own a percentage), Nor Disneyland Paris and the Walt Disney Studio park. TWDC only earns a percentage of revenue.