They had a good payment history for the first two years or three years under the teaser rate.

NPR: Time for Renovation at the FHA?

The plan allows those borrowers who took out subprime mortgages between Jan. 1, 2005, and July 31, 2007, to pursue one of the following options: refinance to a new mortgage, switch to loan insured by the FHA, or freeze their "teaser" rate for five years.

FORBES: Magazine Article

The price rises, in turn, created a continuous opportunity for those same poor people to refinance their houses whenever they got in trouble or the easy teaser terms expired and real money was needed to continue ownership.

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Twitter is used by many as a teaser, to drive the reader (via link) to a longer message, blog, article or website.

FORBES: Facebook Vs Twitter: Do You Have To Choose?