What are "first-time deposit bonuses" connected to?

[Idiotex]

Just a quick question. When we make a first-time deposit to take advantage of a bonus, is that "first-time" connected to:

a) our account info (name and addy)
b) credit card number
c) something else

Basically I previously started an UB account under my name but with my Mum's CC (I didn't have one at the time). So if I start a new UB account under my name with my credit card will this work?

I presume you can't just start a new account with the same name and CC number and get another "first-time" bonus?!

[Pokeraddict]

UB let's you have 3 accounts. The bonus is less then $1 an hour at any limit though so I don't know what you would really gain by it. If you are doing it for rakeback it probably won't work as you will most likely be tied to your original signup method.