It may be the same scammer or few involved.
The "city-of-dresden" is possibly Turkish speaking German (and has been curating this fake community since the start). It is an old scammer, spammer and plagiarist who was farming and exploring Steemit already.

Transfers from "city-of-dresden" to this community.

Also there is delegation from city-of-dresden (aka "literaturkritik") to "instagram-models"

There was also another group that appeared to be either Pakistani or Indonesian that was scamming in it a while ago. List of these accounts:
acorcega
adri22
alelimoon
almaferg
andrep28
crisletting
damini
depressedsoul
detachedsoul
elecris
geralart
hannabae
hearthive
isabel21
isabelvgarcia
lifeofadeleen
marcano
marigon
meganforce
mitsy06
myla04
remian
rheaja
richerl
rodaliza32
rosmerysan
roxy06
ruskevych
salserarina
sunado
viviacaruci
yasintha
yenij
zylydel

"mhshoumik" aka "mahmudulhassan" may be the same one as above or different. His group is this one:

anayaafroz
annya
ariyanaa
aysha005
bangladeshbot
banglavote
bd-steem
burn-hive
dihan
evalina
fernandaguzman
happynation
insense
mahmudulhassan
mhshoumik
mintu999
mirelareina
mshoumik
naiaramarllo
riyana
samantha3105
samara3105
samirah
sanha3105
shopia421
shoumik-wallet
sisirhasan
steemversity
suhana05
sum33
yourdude