Oh and back onto datablock discussion, some notes to those who are unaware.
There is a built-in function called transmitDatablocks(); which will resend all datablocks to all clients. There will be some lag during this process but no freezing.
However, if you execute an add-on that contains files that others don't have, and do need, they will get some sort of error and most likely disconnected from the server. Particles also will not load the image, and instead just simply show up as squares.
About the referrals, if they pay $20 just to see something nice, then that's more money for Badspot. Some time ago Mr.Wallet had said that users with multiple IDs are allowed to use that to an economic advantage in his RoB because buying multiple IDs was supporting the game.