I should also clarify. The sailboats in particular need the bridges raised which is why they have a scheduled time to exit. Ordinary boats can be removed closer to the water or navigate the river without the bridge being raised. Those boats are also removed for the winter.
It mostly seems like this was a response to the complex world of SEO. My perception is that SEO was seen as this pay-to-play 3rd party service that was offered by "experts" which allowed you to get the leg up on your competition. Search engines saw this as value being externally captured so they offered ads. Want to buy your way to the top? Quit paying 3rd parties to play the game and pay directly.
I should also clarify. The sailboats in particular need the bridges raised which is why they have a scheduled time to exit. Ordinary boats can be removed closer to the water or navigate the river without the bridge being raised. Those boats are also removed for the winter.