This data miner, REP-ignorant spider, site scraper, link farm, and Twitter spammer attempts to catalogue and spamvertise itself to all businesses everywhere. By policy, once your data is acquired, it will not be removed.
The purpose of this enormous waste of resources, including resources usurped from others, is to sell an API which provides price-tiered competitive espionage. The web site is technically safe to visit.
Scans your site without asking for robots, has nothing other than their UA on what they are doing on your site (most bots have a link you can go to for more information).
ec2-54-255-187-18.ap-southeast-1.compute.amazonaws.com - - [21/Jan/2015:07:52:01 -0500] "GET / HTTP/1.1" 403 4089 "-" "Mozilla/5.0 (compatible; Owler/0.4; +; )"
ec2-54-255-187-18.ap-southeast-1.compute.amazonaws.com - - [21/Jan/2015:07:52:07 -0500] "GET / HTTP/1.1" 403 4089 "-" "Mozilla/5.0 (compatible; Owler/0.4; +; )"
ec2-54-255-187-18.ap-southeast-1.compute.amazonaws.com - - [29/Jan/2015:10:46:56 -0500] "GET / HTTP/1.1" 403 4089 "-" "Mozilla/5.0 (compatible; Owler/0.4; +; )"
ec2-54-255-187-18.ap-southeast-1.compute.amazonaws.com - - [29/Jan/2015:10:47:02 -0500] "GET / HTTP/1.1" 403 4089 "-" "Mozilla/5.0 (compatible; Owler/0.4; +; )"