OMNI, OMNI P/R and Coupon connection aren't one and the same. OMNI and OMNI p/r are fora in which everything off topic can be posted, discussed. regular games such as count backwards from 10000 etc. are played. Coupon connection is a place where one can barter their wares. i.e. offer a free night stay in return for an upgrade voucher etc.

Per FT's own description:
OMNI is the place for vibrant dialogue on topics unrelated to miles, points, and travel. It is fascinating reading and provides quite a bit of humor and entertainment.

OMNI P/R
Politics and religion are two hot button topics that have earned a special place in the land of OMNI. While passionate debate is encouraged, civility is required


And a quick tip re: searching flyertalk. It drives me insane that so many terms are often rejected or too short so I use google's advanced search. just type into google: "site:flyertalk.com [insert search term here]" (without quotation marks) although for OMNI this doesn't return much (read: anything) that is useful for your queries