and I think bitdumper is nothing here belong to bitcointalk.org.. In bitcointalk you can only make accounts. you must be talking about something else. or you may talking about an external site/service or something out of this forum.
after doing some research for you I found only a bitcointalk Full member account named bitdumper. do you calling about this user? is he your friend?
I found these:
https://bitcointalksearch.org/user/bitdumper-792874 (bitdumper)
http://unixssh.com/forum/member.php?1916-bitdumper
https://www.reddit.com/r/bitdumper/
http://en.miui.com/space-uid-1594053178.html
https://twitter.com/bitdumper
https://www.hackerearth.com/@bitdumper
seems it is just a username of peoples in various social sites and forums. possibly these are the accounts of same person (Shivendra Kumar). instead of them there is nothing with the name of bitdumper. no website, no company, no any product,
not any altcoin. not even a bot which can dump bitcoins(lolzz)