@TeamYouTube When I look at subscribers gained on the YouTube creator studio app one day, the numbers are higher than the same day a few days later. Why? Tuesday was cut in half this morning after a day and a half of being much higher. Same happened for Sunday.
In general, it's normal to see fluctuations in your subscriber count. This is because we want to make sure the numbers are 100% accurate and so we perform additional verification & spam reviews. More insights on subscriber counts here: https://goo.gl/r2UbsJ . Hope this helps.