Section 1
The economics from the buyer's side
Look at the same lead from both sides of the transaction. Your interests and the platform's are opposed on the exact variable that decides your close rate: how many contractors get the same lead. The platform makes more by adding buyers. Every buyer it adds lowers each buyer's odds. You are paying full price to enter a race with a field the seller keeps widening.
Section 2
Why this crushes close rate specifically
Two forces stack. First, division. If a lead goes to five contractors and the homeowner hires one, the average close rate across buyers cannot exceed one in five, or twenty percent, before you have said a word. Reality is worse, because some homeowners were tyre-kicking, some go quiet, and some hire a neighbour's cousin. Treat any specific "leads go to N pros" figure as vendor-stated until you measure your own contact-to-close ratio. Second, speed. When five contractors get the same lead at the same second, the customer talks to whoever calls first and stops answering the rest. This turns lead-buying into a reaction-time contest. The pro with a person or a system dialling within minutes wins a disproportionate share. The pro who calls back that evening bought a lead that was already spent.
Section 3
The one lever the platform leaves you
You cannot change how many contractors share the lead. You can change whether you are first. On shared leads, speed-to-lead is close to the only variable in your control, and it is decisive. The evidence on response time in service sales is consistent: contacting a new inquiry within the first few minutes dramatically raises the odds of connecting and winning versus contacting it an hour later. In a five-way race, being first is most of the game. Practically, that means a shared-lead strategy only works if you have a real answer to speed: a dedicated person on call, an auto-dialler or instant-text-back triggered the moment a lead lands, and a script that qualifies fast. Without that, you are buying lottery tickets after the draw.
Section 4
The honest conclusion
Even played perfectly, shared leads have a ceiling set by the platform's arithmetic. You can win the speed race and still watch your cost per booked job climb as the platform adds buyers to squeeze more revenue per inquiry. Speed makes shared leads survivable. It does not make them a strategy. The way out of a rigged race is to stop entering it as your main plan and build demand that arrives asking for you by name, with no one else on the call.
Section 5
Fitness test
You are ready to buy shared leads if you have a system that contacts every lead within minutes and you have measured your real cost per booked job with that speed in place. You are not ready if your close rate feels broken and you are blaming your pitch. The pitch is probably fine. The lead was sold five times before you dialled, and no script fixes arithmetic.