I don't mind program annoucements.. even to a purchased list but they feel much less effective on me than the ones that come from a program I already know...
Funnily enough the programs that regularly mail for others (and declare it in the email) are the ones starting to shit me... almost better to be not so upfront maybe
Until recently hardly any affiliate programs mercilessly spammed webmasters... GTXcash and Queercash are the only two that immediately come to mind as ridiculously persisitent.. Webmasters might need to start accepting that the herd looks so much like a pack of surfers now we will inevitably be marketed to like the surfers.