Indeed. I just looked up HSBC, for example, and their rate is a whopping 0.01% even on a 30-day access account.Business accounts don't really get any interest rates to be worthwhile.
Natwest are offering 0.1% if you 'lock it away' for 35 days. That's still such a trifling amount, in the scheme of things, that I honestly can't believe any business would see it as a good reason.
Personally, I'd rather pay for something and wait than spend hours chasing round every site in the hope that I get lucky and hit the right site at the right time. I appreciate that's not going to be the case for everybody but then that's why you don't have to order with OC if you don't want to.