"...X also submitted rebuttal arguments, explaining why its online social networking service should not, in its view, qualify as an important gateway between businesses and consumers, even if X is deemed to meet the quantitative thresholds set out in the DMA."
"..the Commission concluded that X does indeed not qualify as a gatekeeper in relation to its online social networking service.."
qualify as an important gateway between businesses and consumers
I mean it can be - folks can get real time alerts from a business this way - but there are other uses as well. I'd argue the meme sharing of that social network is much larger than the actual business use. In other words, it can be used for business, but that's not the primary point of it.