Why is there a D-sub(VGA) to DVI-D(dual link) adapter?

Question

Electronics

Guys, I can't understand why the adapter from D-sub (VGA) to DVI-D (dual link) was created? He does not work and cannot work! I, believing in miracles, bought such an adapter, thought for a long time, rang, but did not send the meaning of the existence of this adapter. The link posted a photo and the results of dialing HERE
Guys, half a year has passed, he haunts me. Your opinion?
Here, I found only contacts by which it is not possible to contact, if someone catches the email - write:
Rexant International
Address: RM 115, 11F, Wing On Plaza, 62 Mody Rd, Tsimshatsui East, Kowloon, Hong Kong, Hong Kong SAR
Tel : [phone]
Fax: [phone]

Answer 1

www.rexant.ru/item_3557.htm

Answer 2

Here is DVI-I, it has 2 pins on the top left and 2 pins on the bottom left - they transmit the signal to VGA (R, G, B, scan - four pins)
Here is DVI-D, it does not have these pins and transmit nothing to VGA output it can't
But damn it! There is an adapter that has DVI-D on one side, and VGA on the other, and contacts R, G, B, the scan leads "to nowhere".
Question: What is the purpose of producing and selling this?
You can kick with your feet and explain where I'm wrong
. Something I forgot how to use Google ... The task is to find the Rexant manufacturer's website with contacts or a connection with a
support. Photos of packaging will help))

Answer 3

It seems to me that here it smells like a divorce for the sake of money. Either a converter chip is definitely used there, or it is a left product, of which the Chinese can have funny things that contradict the established order.

Answer 4

This question has been on the Internet since 2010. Until now, the best minds have not come to a final decision.
Here
forum.radeon.ru/viewtopic.php?p=638529&sid=9f171cd...
the user with the nickname "not_important" writes

and thirdly - and the adapter, respectively, too. - and who told you that the adapter is DVI-D -> VGA ???? if it looks like that, then it just looks like that. and inside it can be a specific adapter for a specific card