Complex sentence: However, database reports, new editor contribs and feedback dashboard remain the richest sources of newbies: new editors recruited from the feedback dashboard, the database reports and the new editor contribs page continue to show up at the Teahouse at the highest rates.
Split into simpler sentences: However, database reports, new editor contribs and feedback dashboard remain the richest sources of newbies: those who are invited through these sources appear to be more likely to stop by than new editors invited through other channels. New editors recruited from the feedback dashboard, the database reports and the new editor contribs page continue to show up at the Teahouse at the highest rates.