If BlackBerry owners are given a choice between $250 towards a new BlackBerry(s bbry) or $200 towards any other smartphone, what do you think will happen? Apparently, even the most loyal BlackBerry fans will go for the offer that pays less cash and jump ship.

That’s exactly what happened with a recent T-Mobile offer according TMo News, which has an alleged internal memo showing the results of a T-Mobile(s tmus) BlackBerry promotion. According to the memo, BlackBerry trade-in volume jumped 15x while 94 percent of those trades led to customers choosing non-BlackBerry mobile phones.

The irony about the entire situation is that it may have been caused by BlackBerry CEO, John Chen. When T-Mobile sent an email in February to its BlackBerry customers encouraging them to switch to an iPhone, Chen took to the BlackBerry blog to write about “T-Mobile’s anti-BlackBerry campaign,” saying:

“I can assure you that…