While I do not profess to be a lawyer, when I read that section of the act I see a very important phrase "who for another". A broker or real estate agent is someone acting on behalf of another person or entity to help them in the process of buying or selling a house. There is only one price and one transaction. The agent then receives a commission or fee for their services of bringing the two parties together.
In my mind, a wholesaler is buying a property for themselves and then selling it at a higher price, making their money on the spread that they create in the two transactions.
I see them as two separate and distinct business deals.
To illustrate:
Transaction 1:
Seller engages an agent to sell his house for 100K
The agent finds a buyer and brings them to the seller.
Buyer purchases the property from the seller for 100K
Seller pays the agent 6K for his services.
Transaction 2:
Wholesaler approaches a seller about the purchase of his property.
Seller agrees to sell it for 100K.
Wholesaler finds a buyer willing to pay 110K.
Wholesaler purchases the property for 100K and sells it to the buyer for 110K.
Profit from the deal 10K.
At no time in the exercise is the wholesaler representing anyone but themselves. That's probably why the A-B/B-C transaction is good to go.
Stephen