Do you have a breakdown on the amount there are each separate color?
 
  Would love to know the amount of Reds and Yellows out there on a FDC. Or how many FDC sets can be made.

I think they would sell for more than 15k usd right now to be honest.

Well well...the stamp Gods have shown some more love...just received a Blue 5 Digit FDC

To anyone sending or storing stamps....

   Keep away from humidity and high temps
   Place in a dry place...use silica gel packs to help
   Do not use any sort of tape near stamps!
   Place in zip lock bag when shipping to prevent any water damage.
    If you live in the country...place some sort of bug protection to prevent insects from eating your stamps.
    Do not pile your stamps on top of each other...the gum can melt and will stick to each other.
    Keep away from any light to prevent fading.
    NEVER USE SCOTCH TAPE TO AFFIX YOUR STAMPS

It is a first day 11 6 '19 stamp but a different stamp then the FDC's

Here are the 2 examples, the second one is mostly found without paper:

Someone did mentioned earlier that since most of the people didn't know the difference and hence ordered the non-stamped versions..

Here is an update, regarding the FDCs.


Redently I stumbled upon an auction with the info "only 2500 FDCs in total issued": See here
I contacted the seller and they said, the info came from the official collectors-info of the Austrian post (they have a dedicated phone number for related questions). I couldn't quite believe it, since that would mean there are less black FDCs than red normal stamps. So I tried calling them.  After several attempts I was able to get through today.

The info I got was as follow:
Usually approx 1/4 is sold as first day issue letters (FDCs). However due to the enormous demand of the regular stamp this time a lot less FDCs were produced. Unfortunatelly they couldn't give me exact numbers. 
But I also couldn't get the 2500 confirmed. So my guess is something in-between ~1/8th to 1/20th maybe.
If anyone can come up with more solid numbers, that would be great. However it seems proper accounting is near to non-existant, so not sure if we will ever get solid numbers from them.