The recommendation is written before any builder is matched. You can decline the introduction and keep the plan. You can ask any builder whether a referral fee is in the quote.
No builder profile is on this site, so there is no outbound referral link. Same-market introductions for one concrete system stay off until a written approval is on file. The founder's consultancy is on the disclosures page, not on a builder profile.
The registry is empty.
Ask for an introduction once a registry exists. That form does not name a builder.