If, say 5 people notice these offers or notice an increase of their annual income as you've described, i could see it being worthy of taking notice atleast.
I have been in touch with others who have had similar recent credit offerings. Could be a coincidence. But why all of a sudden? And why has my bank suddenly inflated my annual income by 5x. I thought that was very strange because they know what my income is. A mistake? Maybe.