Kudos for trying, but since there is a signup bonus for the CSP (and has been for a long while), I doubt you'll get much takers on your request.
It just wouldn't make sense for someone to do the referral work and share their referral bonus 50/50 with you, unless you're willing to do the signup work and share your signup bonus 50/50 with them.
The first CSP signup bonus I googled indicated that the signup bonus is worth about $750 in travel. Are you going to share $375 of that with your referrer?
Or, to make it simpler and only have one transaction instead of two, you could just use the referral link and pay your referrer $375 - $75 = $300.
On second thought, if you do that you may get some takers.
Good luck.