Well, since the mods haven't blocked this thread or anything... (is it okay? It feels like this thread is against forum rules and multiple people have said that).
I have to say that I've been pretty impressed by Comicad. I went in sceptical, but actually advertising with comicad gets me considerably increased sub gain and at a tiny fraction of the cost of advertising on places like Instagram. So I would legitimately recommend giving it a shot.
I do kinda wish more of the ads followed the recommended ad sizes though. I started out by making ads following all the larger listed sizes, but found a lot of the advertisers were only taking these really odd, random sizes unique to them. I guess it's their loss though if they want to make it a pain for me to give them money?