"I know I leased you this entire acre on an ongoing basis, and said you could plant on the whole thing, but now that I see you're actually planting the entire acre and not just a quarter-acre, I'm terminating your lease at the end of the current term—which is compliant with our lease agreement—because I didn't ever actually intend to let you plant on the whole thing even though I listed that, explicitly, on the advertisement for the land"

That means a lie was told.

The reason for not continuing the service means they lied. That it doesn't violate their ToS is beside the point—they offered something that they did not intend to let people actually use. The evidence is precisely the fact that they'll stop doing business with you if you actually use what they sold you (and don't agree to pay them more money).