Owners of S-DICE shares are listed on the MPEX and are entitled to 0.00126315 BTC per share. Each share was issued at the initial IPO for one hundred-millionth of the company. However, the CEO of SatoshiDice is paying shareholders 0.0035 BTC per share.
The original S.DICE shares were bought at the time when 1 BTC was worth less than $15.00/BTC and now hovers around $92/BTC at the time of this article.
This represents a tidy sum of $0.322 per share vs the initial purchase price of $0.0189 per share. This calculates to a 1700% gain on initial investment.