No, I use a custom one, though I made sure it uses the same colors it detected on the site before it deleted everything and repopulated it with those custom ui-cards (though that's an oversimplification). That is also why I do not experience the ad in "latest updates" section, as they placed it inside the updates-area that I am replacing.
I find the default one to be really bad, due to having flaws such as paging, and not showing alternate titles, and not showing description, and not having a button to log [to the console] all the metadata for the title and chapters for closer inspection.
As for the footer, I will leave it be. Eventually they are going to realize it is bugged and keeps reappearing immediately, and fix it. Though if I would get fed up, I would simply ublock that element
Though aside from that part about how the ad interfaces with custom themes, this is quite off-topic. So I will avoid posting more followups on this [off]topic after this