Just days after shares in Gay.com publisher, PlanetOut rose 20 per cent on Nasdaq, a company that invests the wealth of Microsoft founder Bill Gates, has purchased a major stake in the company. PlanetOut, which also owns the Adovocate and RSVP Cruises, floated in October 2004 at a share price of $9, it quickly rose to $14.26 in November. Wednesday, shares closed up at $1.69, a marked improvement on its 52 week low of $0.86.