I just entered in the contest myself. All you need to do is go to the original post: https://productioncommunity.publicmobile.ca/t5/Announcements/Win-a-100-Amazon-gift-card-with-our-More-is-Merrier-Community/m-p/460059/highlight/true#M33979and leave ...
I believe that since October has 31 days, that this is the reason why your plan says it expires one day early and that your payment due date is the day before. 30 days from October 26th (with the 26th being day 1) is November 24th (as the 24th being ...