I beleive Op-Ups decrease in the summer time as the occupancy rates on the business routes are rarely sold fully. For example I flew this year 6 times DXB-TIP, where in the first four I had the Op-Up, however in end May and June none.

I am an EK Gold for more than a year and before June completed the miles for next year.

So I beleive it will happen again after September, when the business travels will pick up again.