The answer - it depends. Depends on the nature of the service, your demographics, your marketing and sales pitch and other factors. I understand you are hoping for a discussion here, but you aren't likely to get anything useful out of it even if it happens. Generic questions lead to generic answers.

Read around instead. There is a ton and a half of information on the subject including lots of personal and very specific accounts. Search HN to find them. Then see which applies to your case and go from there.