Instead of asking the public for a one-off donation (as what may have happened previously with door to door charity collectors or events such as telethons) collectors try and get people to sign up to a direct debit scheme where monies are deducted from their bank accounts each month.
If the person later felt any chest pain, they could do a further test, and the machine would tell them if there was any sign of a heart attack or angina and direct them to seek medical attention.
People also could sign up through Facebook, taking advantage of another community engine and also creating direct links between the brand and its potential customers.
Our members here in the US can sign up for a Liga Masiva Global CSA, in which they receive a basket of organic, Direct Trade products from these amazing farmers.