Your voting power decreases the more you vote. This is called vote rate limiting. It recovers gradually over time according to this:

Again from the whitepaper:

A major part of minimizing abuse is the rate-limiting of voting. Individual users can only read and evaluate so many work items per day. Any attempt to vote more frequently than this is a sign of automation and potential abuse. Through rate limiting, stakeholders who vote more frequently have each vote count for less than stakeholders who vote less frequently. Attempts to divide tokens among multiple accounts also divides influence and therefore does not result in a net increase in influence nor bypass the rate-limit imposed on voting.

The charts above shows how a user’s voting power decreases every time they vote and then regenerates as time passes without voting. These charts use nominal time unit and could be made to scale to any targeted voting rate. Note that voting power rapidly drops off during periods of continuous voting, and then slowly recovers.

Voting power is multiplied by a user’s vesting tokens to determine how much share in the reward pool should be allocated to a given work item.

There's definitely a renewed spirit on the platform since yesterday. Exciting times!