Well I've spend nearly 1k already in server costs etc over the ~6 months Nexious has been running. I guess this is kind of a last attempt at attracting miners as nothing else seems to interest them. If this doesn't work then atleast I know I have tried nearly everything possible to fufill the dream of why Nexious was created (too try help decentralise the hash from the larger pools etc).
I have run the promotion for over a week and that hasn't brought in the desired amount of miners, so looks like no one will take up the offer anyway.
I think you miscalculated the most important factor in starting a new pool, that is to gain the trust. I am not sure myself how to easily get that, because if I would know that I would start my own pool. You have tried to gain that by providing a great front end, but it seems that is not enough as there are still something wrong on its background infrastructures. Your pool has much better front end than for instance
http://solo.ckpool.org, but they gained more trust from the miners. So perhaps great front end does not really matter here, and in your case I think that only hinders the miners in trusting your pool.
From what I have observed, now a days the pools that regularly find new block at least 1 block a day have above 1 PH/s total hashrate. And the contributors on the pools that found the new blocks mostly have above 100 TH/s hashrates. So I think either you have to wait for much longer time and hope that the current miners still stay on your pool, or you have to invest much more in order to reach that level of hashrate by renting it.