@nick Hello,
Masto.host is a one person company located in Portugal, as mentioned in the Terms of Service https://masto.host/tos/ and Privacy Policy https://masto.host/privacy/
The servers are hosted on OVH in France, as you see in the infrastructure details https://masto.host/infrastructure/
Regarding the prices in $US , that has to do with most of my clients being from outside Europe (mostly US) and I decided to opt for what would be the easiest for most clients, instead of opting for my local currency.
GNU social JP is a social network, courtesy of GNU social JP管理人. It runs on GNU social, version 2.0.2-dev, available under the GNU Affero General Public License.
All GNU social JP content and data are available under the Creative Commons Attribution 3.0 license.