I cant confirm if this is the way they do it but i know someone that recieved 500+ RNG chest for free yesterday
Here is how i think they do it, please let us know if you have better idea:
We all recieved code from trion for a free Winter's maiden chest.
i think they have found a way to apply the code multiple time probably by doing it the same way as compensation pack exploit.
The recieved code is not account bound and can be applied once to 1 account.
I think they open multiple browser with multiple tab too (like chrome open with 2 account on purchase button page, same for ie, firefox...)
then they add latency to their connection to be able to claim it multiple time.
Anyone can try it and help me figure how they do it?