I totally ignore promos. Only exception is if the site or program is brand new and their normal rate is acceptable. I care more good conversions, and a decent long term payout rather than a week at $100 PPS. In fact I probably shouldnt say this but if an established program is constantly having webmaster promos I have learned to be weary.
Pay on time, have a decent pay out, accessible reps, don't play any shave games, and I'll hear about you from word of mouth eventually.
Oh yeah, and if I have a 1:200 ratio for the first three months and then it is 1:6,000 for the next two years, do not be surprised if I never touch a single thing you put out under any name ever again.
Nothing personal, just business.