One of my friend adviced me on Betfair, and there was promotion or offer called "Welcome Bonuses" to people who create an account for the first time, and I created an account.
I paid into my money, but they didn’t give the bonus after this. I asked it to support team, and she said me that you can not take advantage of this bonus without any further information. Also, she told me that I have to bet to keep my account.
Do not trust Betfair they are not loyal their promises and poor customer service.