In September 2012 I posted an piece about donations to DXpeditions and how preferrential treatment is shown to those who donate. The following is taken from the T30PY DXpedition website:
DONATION EQUAL OR GREATER THAN US$ 20
“Donors in this category will have QSOs uploaded in LOTW within 15 days after the end of the DXpedition. Also if paper QSL is needed please email QSO data and mailing address to firstname.lastname@example.org. Cards will be mailed with priority for donors without any additional cost. Expectation to mail the cards is early December 2012.”
I don’t think an explanation is needed.