Started using it a couple of years ago and the payments were a few dollars a month. It was great for using a browser that is an upgrade on what I had already.
Now my tokens just stack up every month with me having to touch them. The amounts are a lot smaller as more people are getting a share of the reward pool. The good news is that the reward pool is capped and they should increase over time as the ads keep buying up bat and making the supply scarcer as more people get involved.