that sound is in not one single jack beats track. they don't use bitcrushers to get their bass sounds, it's obvious because bitcrushers usually sound pretty crappy unless you know what you're doing, and even then you can tell they don't bitcrush their basses, it's not even the yoy sound.
as for people using bitcrushers and using this sound in tons and tons of songs. yeah it gets a little repetetive. i actually really like this sound but i am getting tired of it. i think its alright to use it in one or two original tracks, but you should atleast filter it differently, apply different effects or something, and make it sound unique to all the other ones.
since you are using reason, which doesnt allow external VST's, the only thing you can do to achieve this sound is to use a bitcrusher, which sucks in my oppinion because bitcrushers usually come out sounding like garbage. i use Native Instruments Massive VST and you can achieve a very high quality sounding "yoy" with it. all you have to do is use the "modern talking" waveform, and apply an LFO to the "wavetable position". put a formant filter on that, and apply that same LFO to the "intensity" knob and you got yourself a pretty interesting sound.
I have done this in two of my latest tracks, which you can listen to here:
http://soundcloud.com/clydehawkins
The dubstep track titled "Give Me A What?" displays this sound very well, the other track is a fidget house track and the sound isnt quite as prominent in the "yoy" department, but it sounds good to me. I havn't heard anyone use this exact sound the way i have it so i think i did a good job of being original without the yoy being overdone and annoying.