You don't have to be a lawyer, it's quite clear, and numerous lawyers and even the DOJ have spoken to it. Playing OLP has never been illegal in the US at a federal level. Lack of regulation does not make something illegal unless the law states it must be regulated to be legal. There are no federal laws on either side of OLP. In very few states, it has been banned in recent years. Very few, as in, maybe 3 or 4, and Kentucky's status as one of those has been in dispute recently. Black Friday changed no laws whatsoever, nothing became "illegal" after or because of BF. BF was an enforcement of UIGEA (which has nothing to do with OLP nor with declaring any form of gaming illegal), based on the DOJ's interpretation of The Wire Act at the time, and money laundering laws. It was not an action against players.
For years the DOJ used The Wire Act in an attempt to claim OLP is illegal, when many of us familiar with the law clearly understood it applied only to interstate sports betting (and predates the internet by about 30 years). Post-BF, the DOJ finally came clean and formally admitted that the Wire Act in fact did not apply to OLP, and there are no other federal laws that even come close. Without a law to expressly forbid OLP, the UIGEA does not apply to it, but the DOJ will not retroactively vacate their enforcement when it was found that criminal conspiracies occurred in the process of circumventing it by the sites. Once we have a legal judgment that establishes precedent, or legislative action that specifically excludes OLP from UIGEA, then the US market will again be open to OLP pending any new federal regulation around it.