The only two things on that list that aren't absolutely necessary for Twitter to even operate their site are adapt and modify, and if they ever want to show your tweets as excerpts (which seems reasonable enough to me), those are necessary. You are implicitally granting the right to "use, copy, reproduce, process, ...publish, transmit, display and distribute" your words every you post a comment to any site you don't own. Otherwise, they would not be legally allowed to even store your comment on their servers, much less show it to others.