The first title for the log was - "How to lose all progress, and not only". But 

A week of searching online yields no results. No one offers a service to change the adaptation under the SFD2 for a reasonable price. Therefore, I asked the seller to exchange the unit. He found one with an earlier version, which means no SFD at all.

I connected the new unit, purchased online access at https://vaglogins.com/, and began CP removal. Nothing special, just familiar steps. First time I got the ODS1003E (connection troubles), then, after retry, the ODS1008E (no details found, the text was: Negative response from the server: https[:]//cpnbb.cpn.vwg/PIN/PINService.asp). The guy from Vaglogins support said that it is mostly a connection cut error. But my suggestion is that this error was already a first call for something bad. As is likely, the exact PIN service is responsible for Immo/CP authorisation. Anyway, errors like that are pretty common for online access, and after the continuation, the most dangerous error was received!

This is the end! The online access blocks in case of that error. The supplier accounts too. I contacted Vaglogins' support asap. Of course, his first reaction was hangry. But it already happened. The next message was sent to the seller, who sold the unit, and ... he just said - "It happens, you never know". My first thought was - "Are you f**g kidding me?". I said a few times that I need the clean unit, and now just "It happens"? The disappointment knew no bounds. Instead of getting the clean system to work on, I get the stolen part, Vaglogins fee, probably blacklisted VIN.

Thanks so much to Vaglogins guy, he not only listened to me, but also gave valuable information. 

1. Usually, after the FAZ4990E, the server blocks the account that was used to remove CP. But, in this case, the server blocked all accounts that are related to the Audi brand, not only the used by me one. 
2. He said that during the CP removal flow, the server can check not only the just-installed unit but also the old one.
3. Unconfirmed, but also important, is the error message: usually, it includes the victim's VIN. In my case, it showed my VIN. This one is not a confirmed behavior, but all the screenshots I googled confirm it. Other guys who work with CP are telling me that it was in that way, but now ODIS shows only the destination car VIN.

The last item is unfinished yet, and the situation with my VIN depends on it. I can suggest that somehow, probably I was able to adopt the units that already stolen but not reported to VAG yet. And it is a huge problem then, because it mean, that VIN will be blacklisted. Or the simplest case, just the second one was stolen. For more clearer understanding, here is the timeline of how the online CP removal was performed.

What exactly is mine - still no information. Anyway, I need to pay a 200 EUR fee to unlock the possibility of doing the Online. And in the worst case, buy all new units I already have.

On the other side, the 2nd MMI is without the SFD at all, and any coding and adaptation are possible. Also, the seller returned to me the 1st MMI unit, and now I have both. Probably sometime I will try to swap the PCBs to check where the CP and SFD2 are living: on the PCB with the main processor or on the IO PCB. And last but not least is the exact step forward, after all checks, it looks like CP does not affect the HomeLink in MMI.

The only two buttons count displayed here are because I used 4M0907410 HomeLink ECU instead of 4N0907410. It is also a bit sad because it means that MIB3 has a bit different protocol from the previous ones, and to develop and test the support for both versions, the previous MMI is required too.

UPDATE: After posting this Log, the guy from VagLogins unban my account with no fee! Thank You very much for your time, support, and trusting me!