/e/ is actually LineageOS under the hood. Chose it cause i found one of the models they sell new for cheap, thought support for it might be better than a phone having one maintainer. The alternative of buying a two year old phone used, even if it has three maintainers for LineageOS did not look that appealing. /e/ offers a free account with email and stuff, based on NextCloud IIRC. You can get a paid account with more storage space to support them financially.