Complex sentence: Tiago Costa actually joined Gaia in his first account in August 27th 2005, his more famous account being created on August 18th 2006 and since then has become more and more famous on the site due to his movies.
Split into simpler sentences: Tiago Costa actually joined Gaia in his first account in August 27th 2005, his more famous account having been created on August 18th 2006. Since then he has become more and more famous on the site due to his movies.