=== HTTP code : 200 ===

Response headers
================
HTTP/1.1 301 Moved Permanently
Server: nginx/1.15.7
Date: Sun, 14 Apr 2019 13:11:24 GMT
Content-Type: text/html
Content-Length: 169
Connection: close
Location: https://optinmonster.com/

HTTP/2 200 
server: nginx/1.15.7
date: Sun, 14 Apr 2019 13:11:24 GMT
content-type: text/html; charset=UTF-8
vary: Accept-Encoding
vary: Accept-Encoding
last-modified: Sun, 14 Apr 2019 12:47:45 GMT
x-backend: awesomemotive-web6.com
x-cached: HIT
x-proxy-cache: HIT
strict-transport-security: max-age=86400

Request headers
================
HEAD / HTTP/2
Host: optinmonster.com
User-Agent: Mozilla/5.0 (compatible; MSIE 9.0; Windows NT 6.1; WOW64; Trident/5.0)
Accept: */*
Referer: https://itxdesign.com
Connection: close


Link is valid.