Do not try to re-subscribe to unsubscribed accounts (#4653)

app/services/block_domain_service.rb

@@ -30,7 +30,7 @@ class BlockDomainService < BaseService
 
   def suspend_accounts!
     blocked_domain_accounts.where(suspended: false).find_each do |account|
-      account.subscription(api_subscription_url(account.id)).unsubscribe if account.subscribed?
+      UnsubscribeService.new.call(account) if account.subscribed?
       SuspendAccountService.new.call(account)
     end
   end

app/services/subscribe_service.rb

@@ -2,7 +2,7 @@
 
 class SubscribeService < BaseService
   def call(account)
-    return unless account.ostatus?
+    return if account.hub_url.blank?
 
     @account        = account
     @account.secret = SecureRandom.hex