You watch a striptease like “Hyena” by Sweet Lips on Vimeo, and you can’t help but want to tip her. The video takes amateur erotica to a whole new level in production quality. The lighting, the music, the video editing, the camera work and—obviously Sweet’s well-honed art of seduction—all cry out for appreciation. But there’s just one problem: it’s true that Vimeo supports tipping, but only PayPal or credit cards are accepted. I have an inkling that many a person stops himself from tipping a Vimeo stripteaser to keep Sweet Lips’ name off his credit card statement. This is a …