I think that you may have mistaken this for a swinging or hook-up site.
While a number of polys may also swing or be into casual sex (online or otherwise), the focus of most of the threads here on polyamory.com is more on cultivating multiple (poly-) loving (-amory) relationships. (Which isn't to say that OTHER forms of ethical non-monogamy are bad, just that that is not the focus of this forum.)
Good luck in finding what you are seeking.
Me: poly bi female, in an "open-but-not-looking" Vee-plus with -
MrS: hetero, probably mono male, my live-in husband (together for 21 years, married for 17)
Dude: hetero, probably poly male, my live-in boyfriend (of 2 years; friends for longer) and MrS's best friend (for several years longer than that)
VV and MsJ: bisexual women with male primaries, LDR FWBs (of 19 and 7 years)
My poly blogs on this site:
The Journey of JaneQSmythe
The Notebook of JaneQSmythe