@mi4090 Believe it or not I finally won a daily instant win. It was using the alternate method you posted about. (Thanks, I didn't know about that.) It was in the very early hours of the morning as I woke up at 3 a.m. and couldn't go back to sleep. Played about 5 a.m. ET. That was this morning, 2/18.
On 2/4/20 @ 8:42p CT, I used the Free Method to play for the Bed, Bath & Beyond (Weekly Instant Win) and it worked. Everything on the Rewards site resets for me at 11p CT/12a ET.
At 12:38a CT/1:38a ET I tried the Free Method to play for Bed, Bath & Beyond (Weekly Instant Win) and kept receiving the message Play Again Daily. I experienced this for more than an hour. I wasn't able to use the Free Method during the time period of 12:38a CT to 1:59a CT, and unable to play for the Weekly Bed, Bath and Beyond Instant Win. At around 2:04a CT/3:04a ET was able to enter information and submit and got the "Play Again Daily" message. This is the 2nd time this has happened.
I believe the Daily/Weekly wins typically reset at 9am Eastern.
Rules for this specific one don't lay it out, but I have seen it in a previous one where a day was defined as 9am to 8:59am the next day. Here the rules just lay out the begin and end of the whole week.