I haven't investigated their developers' terms in any depth, but my question would be: Do they mean "you" the entity (aka Dreamwidth, and if so, how does LJ handle tweet imports) or "the account" (aka each user)?

Assuming the former, would it be possible to allow the embedded twitter widget, such as

<a class="twitter-timeline" data-chrome="nofooter" data-widget-id="unique_widget_id" href="https://twitter.com/twitter_id">Tweets by @twitter_id</a> <script type="text/javascript">twitter_javascript_code</script>

in a pinned post so someone's feed would at least be visible? (I have a widget for the Twitter account I tweet from as my employer which is why I know the construction there; I don't yet have one for me-the-individual.) IIRC the use of JavaScript is the deal breaker there.