I saw this today:
GET /robots.txt
GET /index.html
User Agent was VsuSearchSpider/1.0
Nothing else was showing up in the header fields.
IP was 79.247.146.x (p4ff79298.dip0.t-ipconnect.de)
This is showing a Deutsche Telekom IP address. Many IP's in the vicinity are mapped to "myfritz.net" host names which equate to the MyFritz residential network appliance so this is definately a residential customer vs commercial or business.