Despite them doing poorly in popularity polls, (Momo and Kinemon legit cracked >90th place) Oda still decided to keep drawing panels for them, focusing on them relentlessly, and never giving up on them despite none of them being popular.
But with the straw hats? You can see how he treats the straw hats that aren't as popular, Franky in an arc that focuses on the smartest man in the world, a man who Franky spent the last 2 years learning from in his lab. Oda can't be bothered to give him any relevance whatsoever. He'd rather give that focus to Zoro because he's popular
And this is is how it is for every straw hat that doesn't place top 10, it doesn't matter how close an arc matches the themes of that straw hat, Oda cannot be bothered to give them anything more than reaction shots, but side characters it doesn't matter if they are last place or have no fans at all, Oda will make sure those characters get millions of panels