Not really, I think I've frequently gotten the 100k levels, if I remember well at least 400k satoshi exchanged from RP, and I take the rewards bonus promotion during 3x, 4x or 5x to help me get there faster.
So at 5x, you really are just trying to get 20k RP which isn't at all impossible.
I didn't know reward bonuses also applied to the 1RP you get from staking 500 satoshi on the multiply.... my calculations were based only on that