Basically, it's a lifetime upvote service that delivers semi-regular votes for as long as you remain active on Steem. Your units earn rshares at a steady rate, and then whenever your rshares balance is high enough, you get an upvote. The minimum we deliver is 0.011 for a post and 0.022 for a comment.

Your subscription level of 5 units is high enough for us to deliver an upvote about once per week (subject to STEEM prices and reward pool equilibrium).

Since you posted 2 days ago, there may be a bug that we need to hunt down (the comment voting features are pretty new and still act a little weird sometimes). Thanks for pointing that out. Either way, you should get 0.011 or more on your next post.