Anyone know about this eSIM provider? (it appears to be a UK-based Vodafone reseller)

https://esim.net/travel/super

They offer a month of "unlimited" for 29 Sterling (US$34 at current rate). 1 month of "unlimited" service, with a fair use policy of 25GB (after which no data).

So...
$34 for 25GB, meaning $1.36 per GB, valid for one month. That's pretty good!

The catch: limited to 75 countries...Mostly Europe, select Caribbean, and some Africa and Oceania:

Albania, Anguilla, Antigua and Barbuda, Aruba, Austria, Australia, Azores, Barbados, Belgium, Bermuda, Bosnia and Herzegovina, British Virgin Islands, Bulgaria, Canada, Canary Islands, Cayman Islands, Croatia, Cyprus, Czech Republic, Denmark, Dominica, Estonia, Faroe Islands, Finland, France (incl.Corsica), French Guiana, Germany, Ghana, Gibraltar, Greece, Grenada, Guadeloupe, Guernsey, Hungary, Iceland, Ireland, Isle of Man, Italy (incl. Vatican City), Jamaica, Jersey, Kenya, Kosovo, Latvia, Lesotho, Liechtenstein, Lithuania, Luxembourg, Madeira, Malta, Martinique, Mayotte, Mexico, Monaco, Montserrat, Mozambique, Netherlands, New Zealand, Norway, Poland, Portugal, Romania, Reunion, Saint Martin, San Marino, Slovakia, Slovenia, South Africa, Spain (incl. Balearic Islands), St Kitts and Nevis, St Lucia, St Vincent and Grenadines, Sweden, Switzerland, Trinidad and Tobago, Turkey, Turks and Caicos Islands, United Kingdom and United States.