The 'risk' here is a loss of respect amongst peers, and following on from that a loss of votes, manual and auto.

I have heard many times, from prominent figures in steemit, that we have to produce content on a daily basis. In fact, I think most people prefer their favorite authors to produce on-topic and relevant content. Instead of posting 'something' everyday.

I see the 'risk' of posting less is only about a smaller chance of content exposure in your follower's feed. i.e. easier to be forgot.

Personally, I will unfollow or remove auto vote only if that author's content is no longer interesting to me. But not because of the less frequent posting.

Just my little opinion...