Do you own or will you be setting up a Elite Proxy soon? If so make sure you get IPs from as many different C class IP ranges as possible. It isn't a topic that is discussed often, but if you
post any quantity of ads on websites without using different C class IP ranges you are potentially making it very easy for websites to track your activities.
IPs are divided into different ranges, A B C and D. By using ranges we are able to log network IDs and network activity. Every computer online has an IP which allows it to communicate with other computers online, essentially functioning as an online mailing address or phone number. Most people know that by going offline and then back online you are able to change your IP, but usually the new IP you are assigned is within the same range. This makes it possible for networks to identify or make connections between user activity to identify what your new IP is as even though you did change your IP, it has not changed significantly so they are unable to find any similarities or patterns in user activities. It is more than possible that this is exactly what websites uses as part of their system to filter out spam. If you wish to remain anonymous to websites then C class IP ranges for your proxy server should help you to do so.
As already stated above, using IPs in the same C class IP range may make it possible for websites to detect your activity even though you could be using several different accounts (since your new IP isn't varied enough from the old one to make you look like a completely different user). This very same concept of using different C class IP ranges applies to proxy servers and is something you should pay great attention to. Typically, IPs that are assigned to proxy servers are normally within the same C class range, this is something you should try to avoid. Anonymity is very important for anyone posting on websites, be sure to ask about getting IPs on your Elite Proxy from different ranges.