It's beyond belief (imho) that a type of frame was the key-ingredient of Van Gogh's post-mortem success. Far, far more interesting is the fact that
Van Gogh did not sell one painting whilst he was alive. I might ask the question, Whyzat?
Here is another instance of where technology tried and failed (largely because of human disinterest) to expand sales of an art-form:
Niepce eventually formed a partnership with a landscape artist called Daguerre. In 1839 they published details of a completely different technique, producing beautiful images of an amalgam of mercury on silver. (Reproductions of Daguerreotypes give no idea of their metallic quality). One reason I started writing this talk was as an excuse to try and make a Daguerreotype, but I ran out of time. Anyway, Daguerre immediately sent one of his spectacular images to the Louvre, but it was returned as being of no interest. Rejected as art, his images did quickly become commercially successful, fashionable as portraits and (in Paris) as pornography. The reason pornography went no further than Paris was probably just that it seemed so shocking - real naked women not just paintings.
My point as the above is that the "success" or not of paintings are due to an immediate appreciation of the artist's work. Some artists succeed, some don't. Some artists succeed in life others don't. Van Gogh was of the first kind, and Picasso the second.
In the above case, the fact that one could reproduce art and thus sell more of it to more people was not appreciated by "the Louvre", which probably felt that "real art" was unique in only one piece.
Frankly, I have no copies of Picasso hanging on my walls, but plenty of Van Goghs. And I have been asked, by French friends, why I am so obsessed with Van Gogh.
I found the remark curious, but that is also a reflection of French tastes in art. Meaning simply that if one is "showing off" art, then would should show a greater array of taste on one's walls.
I just don't subscribe to that notion, and that is an entirely personal decision ...
_______________________________