when we got our merge (s291-295-298-302-306) during first two weeks we had 10 groups in gnw, after the 2nd week we had 6 and after the first month 4 and now are stably 4, are 3 only when one of the group leaders forget to register (are 8 months that the situation is this one). What's good is that there's no sure winner even if ICEx group is theoretically stronger than the others, but my group manages to win relatively often (less likely that 3rd group makes it).