Once their account is set up, users can send a bitcoin tip by including ‘@changetip’ and the relevant amount in a comment on their Google+, YouTube or Tumblr post.
The ChangeTip robots then complete the transaction and notify the ‘tippee’ with an automated comment:
Flexible tip amounts
As well as specific fiat amounts, tips are also denominated in everyday items, including a ‘coffee’ ($1.50), a ‘hamburger’ ($2.50) and – bizarrely – a ‘kitten’ ($3.00).
Users can also create their own custom denominations, such as ‘3 beers’ or ‘2 coffees’. More elaborate denominations, like ‘a trip to Paris’ are also possible, within limits. The default maximum tip is $25, but this can be adjusted in the user’s account settings.
If multiple values are specified in the tip, ChangeTip will send the smallest one. In other words something like ‘beer, beer, beer, kebab’ would not work as intended, although it could sound like a tempting proposition.
The lowest amount that can be withdrawn from a user’s ChangeTip account is 10,000 satoshis (or about $0.05 at the current exchange rate) and withdrawals occur within 24 hours. The company explains that all tips are refunded if they are not claimed within seven days.
While the service is currently free, ChangeTip says that from 15th September there will be a 1% fee to withdraw bitcoin from wallets.
See the company’s explanatory video below:
ChangeTipmicrotransactionstippingYouTube
Original author: Nermin Hajdarbegovic