I know a few, but I am loathed to say as I prefer it that way 
Well, actually, I don’t mind either way to be honest but I like the fact that I send them, if they go away (or bookmark the site), and then come back in via the bookmark or by type-in (not forgetting it will be in their IE history which autofills domains as you type) I retain the credit.
There’s another advantage in that once you send them in via the homepage, you can deeplink without having to worry about the cookie, which I’ve found quite handy before now (ie: poker school, terms & conditions etc). That said, in this case, 32Red allow deep-linking with aff tags anyway…wish everyone did.
So I’m not gonna tell you ‘cos you’ll campaign against it :tongue: