Well you can be sure that if one of these teams does manage to hack ofw 4.21 then most likely a lot of hackers will turn they eyes onto it.
Question is if they do hack it will they release it for free or sell on the info or lie in bed with another dongle maker?
One thing is for sure, they havent learned from the original psjailbreak team. Tehy charged $100 on didnt sell much, but when cloners were selling for $30ish they sold thousands.
We know Tb is way overpriced and they cold sell it for a lot less. But then we also know the dongle itself is useless as it just drm stuff, all the cfw does is check to see if teh dongle is there.