Maybe you would like to work with us? Don't be shy 
Being cheeky won't get you anywhere.
Well we have 9000 traders operating on the platform and many of them are from this forum. Again, what's the problem?
I'm sorry, neither have I heard of your website before nor have I seen anyone of those 9000 traders recommending your site/service. This is despite the fact that I have been a very frequent trader up until October last year(2018).
Understand, I am not dissing on you or your site, I'm just saying 50 quids per referral for a job like this is not fair given the amount of time it'd take to convert each lead to a paying customer for you.
For better results in attracting workers try reaching out to a reputable BTT member and get them to vouch for you. I'm sure if you really have 9000 traders at least 1 would be willing to do that for you.
PS: The point of this forum is not to be just black/white = agree/disagree with anything you post. Sometimes, actually most of the times, you'll get suggestions from peeps like me. Doesn't necessarily mean there's a problem.