I used the SqLite hac on the Bionic for several months. I then got the Maxx. I have not yet rooted the Maxx but the HotSpot app native to the phone will require you to pay Verizon for tether. Hence, if you root the Maxx with the recent hac (Motofail_Windows(1)) then you won't have to pay Verizon squat. However, my guess is that if you start using 59 Gigs of data in your cycle, you'll become a reason for Verizon to look into your sessions online. I.e., they might put two and two together and figure out that you're not paying for access. So as a rule of thumb, I stayed under 5 gigs and never had an issue. Now that I'm using the Maxx, I have to use my T-mobile hotspot because I haven't rooted the Maxx.
I'm waiting for a while to see if those who root with the above mentioned exploit have any problems. So far, everyone seems to be happy.
I might try that FoxFi thing...