The pros agree. Even though this person proves she is capable of a much larger gift, and she has given in increasing amounts, the sporadic pattern feels like she had a revelation or inspiration. But, in effect, that gift looks transactional, not relationship driven, so a “one shot deal.” The facts are that she's an older, single woman with no known contact to the organization and that her prime earning years are behind her.
In this case, one name would probably pay off and the others would not. But if you've got 5000 names to evaluate, CPR is equipped to do what many non-profits can't: systematically handle large volumes of names and evaluate which are the most likely prospects that will give more. CPR has defined the tried and true patterns that can help you develop lower level donors into major gifts prospects.