My educated guess would that this is simply not true. It's a convenient excuse, but a bullshit one. Either covering up engineering incompetence or the good old desire to sell the same thing more than once. And that's even if Prompt weren't a relatively expensive app with a large user base.
In any case, this is not my problem as their client. My fairly basic assumption is that what they sell will last a reasonable amount of time and it's entirely their headache to work out the details behind that.
