Because for an RP reason, it said that it was weakening (Yes, its on wiki) due to the effects of 80 Years War. And Daumann is basically superior in comparison because of having less rephacks with mining corporations. Particularly if Hessians want to kill you... its a target along with Daumann.
There have been rumors about a merging of Kruger and ALG. I can't tell you whether it will actually happen.
Personally, I prefer a healthy and active Rheinland mining faction (DHC-) to two struggling and dying off ones.
So, if I was asked, I would say: join DHC. Pavel and his gang are doing a great job and they will beat IMG| in terms of activity for the first time in... likely years. Congrats, by the way.
As i said before,if Kruger will be created,and the will be normal,not like the DHC- leaders, im ready to help them with money or something else. And i will not be so brutal as to DHC-. (they all dying! atatatata!)