I don't have any knowledge about BankBackMarket being a scam however a quick google search shows that it is a dark market site that sells among other things illegal drugs. It is possible the owner of da dice also owns BBM which should be a concern because if the owner is arrested investors money would probably be seized.
Anyone can make any tag on BC.I
But that can only be confirmed if it is him . It might have also gone through a mixer or might have been a withdrawal from that site. Hard to comment on.
It was not a withdrawal from the site because it was sending funds to BankBlackMarket. IMO the most likely scenario is that it is an internal transfer within BBM with some of their addresses that are not linked to the site. Another scenario is that the owners of DaDice withdrew from LBC from an address that is not yet linked to LBC.
Regardless I think they are being very sketchy in how they are finding their escrow address.
Plus they are having a scammer represent them and paying a scammer to advertise for them. This only strengthens concerns that DaDice is in fact a scam. Why else would they hire a scammer to advertise for them if they were not planning on scamming themselves?