I emailed UT Tyler admissions last week about if they're giving out 40 pre-matches and if the TMDSAS deadline is 1/31 and this is what they said:
Good afternoon,
TMDSAS has extended the pre-match deadline to February 16. The Admissions Committee will have reviewed all candidates who interviewed by this point.
We can pre-match up to 40 students, but the Admissions Committee doesn't have a set number of offers they plan to extend. It all depends on who they feel absolutely confident about. If there are spots left at the end of pre-matches, those will just be additional spots open for Match Day. Students can also accept multiple pre-match offers, so someone we extend an offer to might decide to attend a different institution, opening up additional spots.
All the best,