[[MediaWiki:Payflowpro gateway-donation-tshirt/en]]

In payflowpro gateway-donation-tshirt ("[[:MediaWiki:Payflowpro gateway-donation-tshirt/en]]") there is a part " (t-shirt offer) " with unclear wording, which thus cannot be translated. Who is offering what to whom, or who is asking what from whom, respectively?

This message is about "Donate and get a T-shirt".