Scientology contribute a proportion of their income and comply with the Religious Technology Center (RTC) and its standards. Operating Thetan levels are offered only at Scientology's Advanced Organizations (Los Angeles, Sydney, East Grinstead and Copenhagen). The Flag Service Organization in Clearwater, Florida offers OT levels VI and VII. The Scientology ship "Freewinds" offers OT VIII. In 1955, Hubbard created a list of 63 celebrities targeted for conversion to Scientology. In a church policy letter in 1973, L. Ron Hubbard wrote, "The purpose of [the] Celebrity Centre is, to forward the expansion and popularization of Scientology through the arts." Scientology operates eight
Flag Building among adherents awarded as prizes according to the level of donations. These range from the starting level, "Flag Supporter" (a $1,000 donation), to the mid-ranking "Master Builder of Merit" ($500,000) and so on up to the "Legion of OT Meritorious" ($7,500,000). According to a Scientology magazine published in September 2007, Scientologist actress Kirstie Alley is ranked as a "Founding Member" of the project, indicating a $250,000 donation. The actress Catherine Bell has also contributed and is ranked as a "Double Cornerstone Member" (twice the normal "cornerstone" donation of $35,000 - i.e., $70,000). The project's July 2004 "Cornerstone Newsletter", lists 1,218