UA: GrumpyCrawler/1.1
robots.txt? Yes
IP: 104.44.134.8
CIDR: 104.40.0.0 - 104.47.255.255
AKA: Microsoft Corp., San Antonio, TX
Am please they stopped with robots.txt, but three times in under an hour? Unnecessary:
01:09:17 /robots.txt
01:31:24 /robots.txt
01:58:28 /robots.txt