While giving one of your Forests to an opponent typically isn't a great idea, there were times you'd be happy to shove a Forest to their side and attackor at least give an ally the extra land if there are several players on hand
Lets look at these as TCGPlayer graphs over the last year
Ok No sales data for this card and grade Any value shown for this card with this grade is an estimate based on sales we've found for other grades and the age of the card
These Max and Powerline cards can also be found in booster packs as a new version, Epic
However, given that they don't seem like a mechanic exclusive to March of the Machine, but rather a type we'll see in Magic: The Gathering from now on, it's only a matter of time before cards come out that are good enough to be present in high-power level Metagames
I think it's fine, but building around it might not have enough of a payoff to be worth it besides some extra value