Whether you are licensed or unlicensed (at least here in FL) is kind of a moot point. (For the record, I don't wholesale properties and see a lot of wholesalers butcher deals and burn sellers.) In Florida you can close either through a double close or an assignment of contract. (The assignment box needs to be checked off on the offer in order to do this and most sellers won't allow it.)
There are two types of deals that you can wholesale: on-market (MLS) deals and off-market deals (deals you find through advertising, bandit signs, direct mail, etc.)
If you as a real estate agent and you find a quality deal on the MLS, you can lock it up by making an offer. In this scenario you are a single agent representing the buyer (yourself) in this transaction. You do not owe any agency to the sellers in this scenario and they are fully represented by their own agent. In these situations, you would not only receive the wholesale fee to close the transaction, you would also earn whatever real estate commission was offered on the MLS.
I know quite a few wholesale firms in my local market who do exactly what I referenced above. Their acquisitions specialists are all licensed agents and they earn commissions from the real estate transaction as well as their wholesale fee.
If you as a real estate agent find an off-market deal, you again can legally wholesale it, however there are some disclosures that should be made. Perhaps while marketing trying to find listings you meet someone who is really desperate and needs to close quickly. If no agency relationship has been setup, you can tell them "Hey, I'm willing to buy this house of you in cash. I would be representing myself in this transaction, I'm not your agent," and make your cash offer. In this case, again, you are acting as a single interest for the buyer (yourself) and have not violated any agency agreement to act in the best interest of the seller.
Now, let me explain why as a real estate agent, I DON'T DO THIS. There's an old saying, "Pigs get fat, hogs get slaughtered." In both of the above scenarios I have the opportunity to make almost double the amount of money by collecting both a commission and a wholesale fee. However, my ultimate goal in working as a Realtor is to make the client that I represent the most money in a transaction. When working with investors, these are the clients who I am trying to make money for. By adding in wholesale fees, I am stripping value from a house that they are hopefully going to relist with me after their rehab. Yes, I could make that extra money by wholesaling the deal onto them, but I would feel far more comfortable knowing that I got my client the best price possible and gave them the best opportunity to make money on a deal. If I had a $10,000 wholesale fee tacked onto a house with a $40,000 profit at the end of the project, I just took 20% of the profit on the deal. Also, if the developer is going to work with me on the resale, it will be making my job harder to get them the numbers they need on the listing side. This may result in them wanting to list at a higher price, which in turn makes the property harder to sell, costs them more days on market, and results in significant carrying costs, especially for clients using hard money.
A purchase price difference of $10,000 can also make a world of a difference when a buyer is getting their hard money in order, requiring them to bring more cash to the table. Depending on where the hard money lender's valuation comes in, this can be a significant number.
Wholesaling certainly offers opportunities, and I can understand using it as part of your investment strategy. However, as a licensee, I see it as a short sited strategy that can cost you on the back end. I'd rather have happy investors who will continue to buy and list with me, than bleed deals out before they even get off the ground.