Yes, ESIM.DOG sells unlimited data eSIM plans for Saint Martin. The plans are available in a range of validity periods from 1 day to 30 days. Prices start at about $1.48 USD for a 1‑day plan and rise to around $17.35 USD for a 30‑day plan. All of these plans give unlimited data, and the feature list notes that eSIM.DOG allows tethering while speeds may be throttled.
The plans state a maximum speed of 1000 kbps for most offerings, with some plan variants capped at 384 kbps. Unlimited plans generally operate under a fair‑usage policy, so after heavy usage speeds may be reduced. If you require confirmation of the exact limits or whether the fair‑usage policy applies to your usage, it is advisable to contact ESIM.DOG directly.