Hey they appear on leofinance but here's the problem. Your article appears on other front ends too like peakd and hive. So google has a hard time to choose which one to show on it's results. When using the native leo interface to publish your post you "help" google understand that it should show the leofinance website as the original source. Which means more traffic for leo. Which means more ad revenue. Which means potentially new Leo users leading to more ad revenue etc etc. And more ad revenue means more Leo coin burns and more funds for the team to make Leo great!