A pending vote value is tracked for every enrolled account. Every 2.4 hours, we increase your pending upvote value, based on your unit levels, at a per unit rate that we have determined to be sustainable.
Each time an enrolled account posts, we check whether the account has accumulated enough pending vote value to support an upvote. It takes a pending balance of $0.063 to deliver our minimum upvote of $0.021, but we start every new member with enough pending vote value to receive their first upvote right away.
After your first upvote, the time until your next upvote depends on how long it takes to ‘recharge’ the pending vote value that was already delivered and bring your pending value above $0.063 again.