I have noticed that recently, almost every single question and answer has received one upvote.
However, the purpose of upvoting is to differentiate between good and bad posts.
It is in principle good to upvote questions, and rewarding quality answers and questions. This is where the serial upvoting is lacking: Answers that lack references or are simply totally wrong, questions that are off-topic are all receiving upvotes. This distorts the purpose of voting: to differentiate between good and bad posts.
So please stop upvoting for the sake of upvoting, take time and consider whether other users should see this question because it has good quality and is on-topic, and if this isn’t the case, don’t upvote.
You aren’t doing yourself, the site or the owner of the upvoted post a favour by this serial upvoting.