Well, upsells are certainly better than shaving, many programs couldn't compete without them, but I certainly prefer upsells I get money for as well.
The
Teen Revenue (Little Lupe, Texas Twins, etc.) guys are a good example. You can upgrade a membership to access all sites and affiliates get paid for the upgrade.
What I'm more worried about are excessive X-Sales, since they are often pre-checked on signup forms, hidden at the bottom and piss off surfers alot when they see a 90$ bill instead of the expected 30$. They never again pay for porn.