Today's article from AMUS about this topic (translated from German)
"The contract with Monaco expires at the end of the year. And it might not be extended unless Monte Carlo is prepared to give up some of its special rights. F1 boss Stefano Domenicali made that clear to the organizer in a first round of negotiations.
The talks do not revolve around the entry fee, as is usually the case. Monte Carlo pays between 10 and 15 million dollars, which is significantly less than any other race. There, it starts at 25 million. But that is not the sticking point.
It's about various special rights that Monte Carlo had already wrested from Bernie Ecclestone in the distant past. And this is how it looks. Monte Carlo produces the TV pictures itself and thus determines which sponsors are shown and how often. This is just as much a thorn in the side of Formula 1 as the organizer's own paddock club. Although this also exists in Miami and Baku, it is nowhere near as large. One of the biggest problems for Liberty is the perimeter advertising for TAG Heuer. This clearly opposes series sponsor Rolex.
The final issue is that Monte Carlo has so far been unwilling to modify the track to facilitate overtaking maneuvers. The proposal to omit the chicane and widen the track up to the tobacco curve has so far been rejected. Another round of negotiations will follow. Tenor from the board level: We are not asking anything impossible from Monte Carlo. It will still be the best contract for a promoter there is. Just with fewer special rights."