With 200 satoshi daily dividends, if they can mantain this proportion ( by adding some hashpower as the difficulty raises) it adds up to 0,007 btc of dividend per share per year.
meaning that at 0.007 is roi 100% in 365 days
I think you've made a mathematical error 0.000002 (assuming that's 200 satoshi) x 365 = 0.00073 (or 0.0007). This would mean with the current prices of the stocks, you can atleast expect to get 100% return + assuming that they do increase their hash to their promised TH - taking difficulty into the equation, however with this stated - most investors who bought in at IPO and higher won't be seeing a decent return anytime soon. (maybe?)