Everything everyone posts on Twitter can be used by anyone for any reason. It's in the Twitter TOS. Disney didn't even need to post anything, they could have just used your tweets for whatever they wanted to use them for.
“You retain your rights to any Content you submit, post or display on or through the Services. What’s yours is yours — you own your Content (and your incorporated audio, photos and videos are considered part of the Content).”
“You retain your rights to any Content you submit, post or display on or through the Services. What’s yours is yours — you own your Content (and your incorporated audio, photos and videos are considered part of the Content).”