Some receivers with an architecture similar to BBRF103 appeared in the web during this look down time.
I tried to contact the authors not for copyright issues, being BBRF103 completely open source but to exchange some experiences. A contacted person wrote me that the project is new and fully original, but I think I reached the re-seller and not the designer.
So I signal my interest in talking with the real authors of the devices.
I list the devices with links to images that are in these weeks at the following links. 

If someone has a review or any other info please send it to me.

Thanks, everyone,  ik1xpv AT gmail DOT com

Update 15 August, 2020

- If you want to give a try to BBRF103 software with these receivers, here the compiled ExtIO_sddc.dll : v.0.96 (HF only) and v.0.98 (HF and VHF).

The Dragonfly RX-666 SDR © Bjarne Mjelde, arcticdx.blogspot.com

 

Update 19 August, 2020

- The RX888 SDR – Up Close Photos at  https://swling.com/blog/2020/08/the-rx888-sdr-up-close-photos/

- The RX-888 Team sent me the link to they RX-888 software at

https://drive.google.com/file/d/1hqV2-ZCl1iDz7IvOsBS-YR5XGLpOd6ER/view?usp=sharing

 

 

RX-888 

source: 

http://www.radioscanner.ru/forum/topic46950-28.html

https://twitter.com/fei666888

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 RX-666 ?

source: 

TAOBAO    https://item.taobao.com/item.htm?spm=2013.1.w4023-1262356524.17.4ea334a9ZaAa2W&id=617774885587

 

Aliexpress https://www.aliexpress.com/item/4001080658440.html?spm=a2g0o.detail.1000023.9.6ccb4491vlqtWJ 

 

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BBRF103  posts 

BreadBoard RF103          20 June, 2017

Some variations of ExtIO_sddc.dll architecture        31 August, 2017   

Troubleshooting BBR103          22 September, 2017

BBRF103 and ExtIO.dll ver. 0.96 get 32 MHz span    1 March, 2018

R820T2 update - BBRF103_2 PCB           10 April, 2018

BBRF103 - Band L reception                  26 May, 2018

Just another BBRF103 version                  14 August, 2018

BBRF103-2 RC3 is here!                         1 September, 2018

BBRF103 Construction notes                   4 May, 2019

BBRF103 Some measurements               20 May, 2019

Receivers similar to BBRF103 ?               08 June, 2020

PScope a useful tool               19 June, 2020