I don't use any of these techniques but I occasionally encounter something similar with my e-mail newsletters. I have over 160,000 subscribers so they're not entirely unpopular but I'll sometimes hear from someone saying "No-one uses e-mail anymore. I can't trust you won't spam me or sell my address! Why don't you offer RSS?"-wacka-wacka. My response is usually that it's not for everyone and have a nice day ;-)