Minecraft [Windows 10 Edition] was free?

My normal Mojang account with MC had been registered since 2016. I once had the opportunity to copy a code for Windows 10 Edition (on the website itself), but now I no longer see this possibility. What am I doing wrong? Or is it a bug? Or is the function simply no longer available?

Thanks in advance, LG

I'm unsure of myself, but I've heard that Minecraft just disabled the codes on newer accounts. I can't do mine either.

This was only possible for a certain time.

But my account was created in 2016, it should be shown then. Such a trash a shame.

The distribution of the free keys was ended with the RTX Beta of Windows 10 Edition.