Hi Shafiek,
This rule is stated in the Bonus Terms section (https://www.tradacasino.com/promotions/BonusTerms), the same place where we stated the original maximum bet. It is also stated on the information page for the welcome bonus.
The term was implemented as a deterrent to players who have been engaging in a spate of fraudulent activity, however I cannot go into any further detail as to exactly what the fraudulent behaviour is.
As I said, this term can be lifted when prior approval is obtained from the support team but it is at the discretion of the TradaCasino team and we cannot guarantee we can do it for all players.
Thanks,
Rachel.