> Publisher marketing is minimal to none these days.
Sometimes true, sometimes false -- depends on publisher (and often on internal politics). What they want to push gets money thrown at it, whether or not it's productive: or sometimes extraneous shit happens. (I have a personal example in mind but I do not feel able to write about until after June 2018, at which time I will no longer be with the publisher in question ...)
> Also, due to cluelessness, the marketing you do get is often not very useful.
To some extent this is down to the author. If you actually roll up your sleeves and suggest some affordable and productive targets for marketing spend, the marketing manager in charge of your book will love you to bits because you just made their job a whole lot simpler.
Again: many authors seem content to leave it in the hands of their publisher's marketing department, who are overworked and under constant budgetary pressure. And because they're overworked they don't have time to research/learn new tricks. (I recently saw a proposed marketing plan for a book of mine scheduled for 2018. It was great ... just like the one they ran in 2008, only with a Reddit AmA bolted on top. Yeah, right.)