Yes because it only depends on your activity. Mind you it makes no sense to split that up and I would rather focus on one to take advantage of all possible benefits ... .
That should hopefully be the case until the end of the month, last thing I heard was that Merge wants to re-open to new US sign ups between August 15th and 31st at the latest. But well, initially they said 3-4 weeks and we are already more than 1 1/2 months over that deadline lol.
I actually have accounts on multiple Merge skins(Black Chip, Carbon, RPM, etc...), both RB and non-RB. I signed up for different ones to make sure I could transfer RB to the others if I wanted, which some affiliates said would be possible in the future before they ended RB. Of course there would be a period of inactivity required on the RB account.