This move comes in the wake of Pietersen's axing from the third Test against South Africa and not picked for the World T20 in Sri Lanka to be played next month, following a series of issues concerning the player.
Pietersen who had sent a few derogatory messages about Andrew Strauss, coach Andy Flower and the atmosphere in the dressing room to South African players, was dropped from the Test squad and was asked to apologise for his deed.
Moreover, the offer from Big Bash League is the only lucrative deal that Pietersen has at the moment, and if he is interested in playing in Australia's domestic T20 tournament, then the South African-born cricketer would be missing successive Ashes series in England and Australia over the next 18 months.
If he plays in the Big Bash League, he might also send a message to the Board as he would be starting a new life as a hired cricketer to play T20 leagues around the world.
To make things worse, if he wants to play in the Indian Premier League next year, he would be missing the tour of New Zealand in 2013. It is learnt that Pietersen had also raised this topic duirng his talks with ECB, while discussing about the new contract.
Now, with the stylish batsman signing a deal with a TV Channel- ESPN Star-sports, adn joining the team of commentators for the World T20 in Sri Lanka, starting next month, all eyes will be on Pietersen as he would get a chance to comment on his team mates, following his damaged relationship in the dressing room.
Moreover, if ECB continues to ignore him for the tour of India later this year, Big Bash would be the only option for Pietersen, which might also mark the end of his international Test career.