Reasons to make your own faucet

1. To give something back: Faucets are a great way to help introduce new people to bitcoin, or to alternative altcoin's. A majority of faucets provide information to new users as well as offering them some free coins so that they can ‘try before they buy’, experimenting with a test transaction or two before putting real money on the line. Since this whole experience is so new and a bit complicated to people, who perhaps don’t quite trust it with their hard money, this is a beneficial way to promote digital currency and bring in new users.
2. To get traffic: Faucets are high traffic websites. It is not all that difficult to get a huge number of page views per day to a site which is giving away free money. If a website has other content or services to promote to Bitcoin users, especially new users, a faucet is a great way to bring them to make them familiar with a brand name.
3. To make money: Making a healthy profit from a faucet site on its own is a lot harder than just making a popular faucet, but it is still possible. There are a lot of these sites around today, so it's a very competitive market, and earning enough from advertising to cover the cost of the coins you are giving away and hosting costs is nearly impossible. Adding additional content to a website, or creating some kind of unique or interesting twist, is the only way to generate an income for a Bitcoin faucet.

What are Bitcoin Faucets ?

Bitcoin faucets were developed by Gavin Andresen in 2010. Bitcoin faucets are a reward system, in the form of a website or app, that dispenses rewards in the form of a satoshi, which is a hundredth of a millionth BTC, for visitors to claim. These rewards are dispensed at various predetermined intervals of time. And can be claimed by either completing a captcha or task as described by the website. There are also faucets that dispense alternative cryptocurrencies.
Faucets usually give fractions of a bitcoiin called a satoshi, the amount will typically fluctuate according to the value of bitcoin. Typical payout per transaction is less than 1000 satoshi, although some faucets also have random larger rewards. To reduce mining fees, faucets normally save up these small individual payments in their own ledgers, which then add up to make a larger payment that is sent to a user's bitcoin address.
As bitcoin transactions are irreversible and there are many faucets, they have become targets for hackers stealing the bitcoins.