Does anyone know what the considerations are when a news site, such as NOS, deliberately embeds Twitter/X posts in an article but does not embed Mastodon posts?

Could it be because the CMS does not support it, because it would put too much load on the #Mastodon server, because of the size of the community, allowlists or blocklists, CORS issues, or something else?

Article:
https://nos.nl/l/2615957

Mastodon message
https://mastodon.social/@netblocks/116640992912802471

Twitter message
https://x.com/netblocks/status/2059256883274240508?