Re: Is there actually any business need
"To keep a name and address and in particular payment details once the transaction is completed?"
No. Earlier today I wanted to buy a book advertised on Abe books. To do that it wants me to set up an account. That would mean either giving them the current odds & ends email address that gets zapped after a few weeks in which case I wouldn't be able to reuse the account anyway or log into my email provider and set up another special address for them. As the shop isn't too far away I just rang them up, asked them to put the book to one side & I'll collect it later. The only downside is that SWMBO will probably come with me and letting her loose in a bookshop will cost several hours of time if no actual money. In the mean time Abe books lose their commission.