Clicking the link at the start time isn’t the right strategy. The way this system works is everyone who clicks the link and has the page open BEFORE the start time gets randomly assigned a place in line. If you click at the start time or after, you start at the back of that line, behind everyone who was on the page with the countdown before the start time. The second the clock hit 11 am EDT, there were already more than 10,000 in line ahead of you. This is why people are saying to use multiple devices - each one gets randomly assigned a place in line, then you just use the one with the lowest number.
For example, I opened the link on my computer the night before and left it open. At 11 am, I was randomly assigned number 3,6XX in line. Took about half an hour from then to get in to the registration page.