that also has a cap, you're not getting more than $6 per 1000 robux there, which is a little under double the official rate but still only 2 thirds of what users actually paid for said robux. not including the risk of the platform banning you.
i picked the 10k robux for $100 package as the baseline - the grey market has never reached that ceiling. no, when cashing out, 1 robux is 1 robux, doesn't matter what currency you paid for it. an exception was if the robux was old, from the period where you could trade tix (free) for robux, but i don't think that applies anymore
