2. Regarding Shadow being invisible on the blockchain I was curious about the XMR explorer. What does it explore?
Transaction, but you cannot know the amount of XMR sent because transaction obfuscate the actual amount. So, when you see a 100 XMR transaction, all you can say is that that the sender has more than 100 XMR in its account.
And then it is my understanding that you would face the same issue as Monero: no (scalable) B2B infrastructure for CryptoNote exists yet.
Would you please mind elaborating or explaining in simpler terms what a B2B infrastructure is?
Business-to-business. Payment processors, automation...
I was (and am) curious about who Techovert is and what he might have done before.
Unfortunately (but fittingly) he remains a complete mystery and has made no appearances in IRC or BCT as far as I can tell.
Typical cryptographer behaviour

My understanding is ShadowCash would not be affected by this since a) SDC is a descendant of BTC and b)
a cryptonote coin.
I dont think merchants/sites would need to do much on their end to support Shadow deposits and withdrawals. Even if a merchant did not wish to accept Shadow you could still send a Shadow>SDC tx