I got the proton plus because:
1) cheap
2) includes something like 10 different emails with more storage than I'll ever use. Also fuck google mail. With proton, some version of your actual name is probably still available as an email address. You don't have to have an email like "Iceemano1972xyz@proton.me" as your email. You can probably just be IcemanSmith@proton.me. For example, I use my actual first name, middle initial, last name as one of mine. I also have firstnamespam@proton.me for ordering crap online and they want an email.
3) the country/location that the server is located in is randomly chosen. It does every now and then pick a server in Texas, but you can just tell it to pick another. With the free version, you are limited on how often you can do this.
4) Backed up by Swiss privacy laws. (Full disclosure, I have no idea what this means).
Not sure about MLB.com. Try the free one. If it doesn't work for MLB, then the paid one probably won't work either.
Works fine for pron.