"If you don't upvote your previous points disappear. So you have to use it regularly."

Thank you, I was not aware of this fact. That explains why there is a user on there with over $500 SBD saved in points!

The good thing is you are allowed to vote at 1% weight, so it is very easy to meet your quota.

"(though my earnings were less compared to yours 😁)."

I bought a big whale vote to help my curators/voters, and to help promote Steem Followers, but I think it came in a bit earlier than I had hoped. It cost over 50 SBD.