Companies will hire you when they have a lot of information that they need inputted into spreadsheets, and sorted in a particular manner. Many times, this includes information typed on paper and scanned into JPEG, or using online forms. When companies have a lot of data to input into spreadsheets or a database, they will outsource the job, but often times this is a short-lived job. However, you may find recruitment and staffing who will hire you for the long-term; in many cases, when your contract ends, the staffing agency will find you another job quickly.
Spreadsheet entry jobs fall under the data entry category, and they are most sought after jobs for people who want to keep themselves busy while they wait for a preferred job. The reason these jobs are popular is because they require basic computer skills; and if you need to do the job from home, all you need is a computer, Internet connection and a good typing speed.