Bitcoin fountains have been there since at least. It is believed that Gavin Andresen was the owner of the first. Come to go and are often just advertising scams: the owners want users on your site so they enticed them with free Bitcoin that never materializes because before users have done enough to "remove" the site It has disappeared.
It's also hard to judge a Bitcoin key, especially if you're a newcomer. The author once participated in taps. Remember that when it started, they reached up to 0.002 BTC on request. Most fountains pay once a week, but Freebitco.in seems to be the most legitimate one we can recommend. They obviously pay once a week or when the user has reached a certain limit. They have a complete system within the space, and a sick user with more time than money could win some cold, hard satoshi.
In its simplest form, Bitcoin keys are apps or sites that generate rewards for users who complete many trips. Think of it as an automated search engine rewards, thus completing it is a simple task or rewards verification users rewarded with a fixed amount of Satoshis (one millionth of one Bitcoin).Free Cryptocurrency giveaway - best way to get free litecoin