The T-shirt incentive for relay operators is gone, as far as I know. 

If you donate $100 or more here you can pick a T-shirt as the gift: https://www.torproject.org/donate/donate.html.en

There are many alternative ways to monitor the health and uptime of your relay. I like https://www.statuscake.com/ for this and their free plan is sufficient. I'm not affiliated with them, I just like their product.