Changetip’s interface is simple and fun. You can use people’s aliases and you can tip them in words instead of code.
To the average person a bitcoin address (e.g. "1KeBs4HBQzkdHC2ou3gpyGHqcL7aKzwTve) looks like tech-nerd gobbeldygook. It hearkens back to the era when websites were just IP addresses. Folks don’t want to deal with long random strings of letters and numbers.