Using it for spamming or illegal purposes is forbidden and any such use will result in the TinyURL being disabled and you may be reported to all ISPs involved and to the proper governmental agencies. This list will show all previously created tiny URLs and values prior to encryption: To quickly find the redirect string, select "Hash" from the search dropdown and paste in the hashed value from the URL. As a result, many have been removed from online registries or shut down by web hosts or internet service providers.
Twitter will use this to make your timeline better. Some folks might already be fully familiar with the process of URL shortening, providing a shorter and sometimes more memorable URL that is easier for someone to type out or include in an email or other short message. Don't use your company name: URL shorteners can also be formed from product names, words common to your industry, slogans or even slang.
With a custom domain for your link shortener, people will see that you are not spamming and they will be more likely to click on your custom domain shortened link than a generic shortened link. Alternatively, if uppercase and lowercase letters are differentiated, then each character can represent a single digit within a number of base 62 (26 + 26 + 10). See if you are using Classic Analytics (ga.js) or Universal Analytics (analytics.js).