As a fellow Sumo-Owner, come and join our telegram channel (might have said this to you a few times before ...  )

@thorRJ: Sumo is a young coin. We got some nice feedback on social networks lately and DEV work on the implementation of subaddresses in a new GUI-Release (even though subaddresses are merged into binaries already). If you want to have more information, join our telegram-channel. We have a nice community there.

And to answer your questions:

No, Sumo is not traded in the deep web (as far as I know).
No, Sumokoins DEV were not part of Monero.

If you have more questions, just ask!