Give the Mormons a miss. They expect 10% of your gross income every year. Our own dear old CofE is a bargain, you put whatever you choose into the collection plate, and that only when you attend. Like most Anglicans we only go on high cays , holy days and for rites of passage. Tops it costs us £50 a year for me and MrsP. Our Parish Priest has a fine collection of foreign coins BTW albeit NOT via us.