If I’m not mistaken, Twice and BP typically receive similar amounts of likes within the same period. Only RV received an extra boost than usual, but I assumed that’s because their fanbase was more dedicated on Melon, so they always had that extra push on that front. I wouldn’t think much of likes though. They don’t really indicate much with the way how easily they can be manipulated by fanbases.
We'll never know for sure of course, but it's weird to assume that Red Velvet have a bigger/more active fanbase purely only for this, when up till now always was assumed that BP and TWICE have the bigger, more active fanbase as seen in album sales etc.
Also, wouldn't streams be something that fans have more influence on? Genuinely asking.
Because 1 active fan can count for 10-100 casual listeners, due to the enormous amount of streams that 1 active fan can contribute compared to a non-fan casual listener, while 1 fan can only like a song 1 time, equally as much as a casual listener can => likes seem to equalize fans and casual listeners and bridge the gap in their individual influence, while streams seem to be where an active fan can really outdistance a casual listener.
Unless I'm interpreting streams and likes incorrectly, and the system works in an entirely different way.