It seems like he's gotten a big boost in recognition in the last few years. I'd never heard of him until recently, and now he or at least his influence seems to be popping up all over the place.At the time, American-International Pictures was churning out a string of profitable Poe movies starring Price. This eventually led them to start slapping Poe's name and titles on Vincent Price movies that had nothing to do with Poe. (See also THE CONQUEROR WORM and CRY OF THE BANSHEE.)
But, yes, "Edgar Allan Poe's THE HAUNTED PALACE, based 'The Case of Charles Dexter Ward' by H.P. Lovecraft" is bizarre even by Hollywood adaptation standards.
I guess Lovecraft was not considered a marquee name back in 1963.
And speaking of Lovecraftian fiction:
http://www.tor.com/2016/05/24/reprints-those-who-watch-ruthanna-emrys/
Wow, I just read through the bio for him on Wikipedia, and it's sad that someone who has gone on to become so influential had such a hard life. But then again, I guess if he had things easier then he wouldn't have written the kinds of stuff that he did.