This is the campaign overview , with all campaigns mentioned :-
https://bitcointalk.org/index.php?topic=615953.0FXOpen , XBTec , 777Coin , UpDown.BT and PD offer per post payment.
They offer max posts varying from 400 to 600 per month , meaning you will earn from 0.4 BTC to 0.81 BTC per month
UpDown.BT has been inactive for a couple weeks though , so FXOpen can earn you the most at 0.65 BTC for 500 posts if you convince them to allow you in.
The rest of the campaigns offer from 0.09 to 0.15 BTC per month , but not sufficient for your post quantity.
Your best bet would be to talk to the owner of any of the aforementioned campaigns and offer them around 1500-2000 posts for 1 BTC.
1.5 BTC seems far-fetched for your current post count , non-hero status and the fact that your employer won't know how constructive your posts will be.
I'm not saying that you have any nonconstructive posts so far , but I'm not sure any escrow will be willing to settle disputes on whether payment is deserved or not due to posting.