Oh its not gonna drop exactly 7% every week especially not as long as investors cant do basic math, but on average the market value of the hashrate that your share represents, will.  Now you can allocate mining revenue to increase your hashrate ('reinvestment') or pay it as dividends or do both in any ratio you want, but if you dont earn more in net mining revenue than the rate at which difficulty goes up, it doesnt take a rocket scientist to figure out what will happen.

Besides, as it happens, last IPO was on May 23  @ 0.0975 Now 2 weeks later thats worth 0.072. -12.5% per week

But hey, enjoy the 2% weekly dividend for as long as it lasts.