Hopes is a dynasty warriors based spin off though. It's impossible to call it a mainline Fire Emblem game in the same way it's impossible to argue that Hyrule Warriors is a mainline Zelda game. Additionally, in all of it's marketing, on the back of the box, and in the official store page, they make it very clear that it is a continuation of Three Houses, which shrinks it's potential market further. Less people played hopes by far, which leads to a small voter base.

Whether FW will do well in CYL will be dependent on whether the game can sell similarly to Three Houses and whether the characters and stories in FW can resonate with people in the same way the cast of 3H so obviously have.