Services (Context.Tag) vs “orphan” Effect functions that require deps

export const createMembership = (rawInput: z.infer<typeof createMembershipSchema>) =>
  Effect.gen(function* () {
    yield* SomeService;
    // etc...
  };

export class MembershipService extends Context.Tag(
  "@MembershipService"
)<MembershipService, {
  createMembership: Effect<Foo, never, SomeService>
}>() {}