As I understand it, merits are only acquired when one has good motivation. And merits are kept only if one does dedications.
So in this example here, I believe the lady in question would not have accumulated any merits at all, as her motivation is to get rid of the statues, not to benefit the recipient.
And for those who say that what she did is better than throwing the statues away --- yes that is true, but why didnt she throw the statues away then? If it was because she was afraid of negative karma from throwing away statues, she is correct... but then again, her motivation for giving away her statues was not to benefit the other person, but to save herself from accruing that negative karma.
So once again, no merits.