PayPal Money Market

I signed up for PayPal's money market account. Apparently nothing changes about your paypal experience except that they deposit interest on any money you keep in paypal at the end of each month. This month's interest is 5%. How can you go wrong? I haven't read anything negative about it, and the prospectus seems fine. I won't put my life savings in there, but there's no reason the money I make from beading shouldn't make me even more money ;)