Do you know what sajaegi means? It's when company bulk buy their own album to make the album chart higher. SM did many cheap tricks to make SuperM album sold a lot in fast time but none of it can be considered sajaegi. They aren't that low to even do sajaegi. SM stans who accused BTS and BigHit to do sajaegi most likely just really disbelief there's idol from non-Big3 companies who can really surpass SM idols sales-wise.