In principle I'd agree, but the bad thing is none 
of the other services (Yahoo PayDirect 
included) has as large a customer base as PayPal, 
because Paypal did it first, and managed to grab a 
large share of the market. It's sort of the same 
as the fact that if you want the best sale, you 
use Ebay as your online auction site, because it 
was there first, and gets the most traffic even 
though other auction sites may be run better. I 
know plenty of people that don't care to use more 
than one service of that sort, and they already 
have PayPal, and more people use Paypal than any 
other online paying service, so if you don't use 
Paypal, you end up turning away a great deal of 
possible customers. I rarely bid on auctions where 
people don't take Paypal- it's such a hassle to 
pay other ways, and I don't care to have more than 
one of these services handle my money. It has to 
be a hell of a cel to get me to send a money 
order, and no auction is going to get me to sign 
up for Billpoint, Bidpay, or Yahoo paydirect.