Hi! Thanks a lot for your honest feedback regarding our subscription model. I’m sorry to hear you feel this way. Please be assured that the free version allows add additional accounts and upload attachments to your emails. The total size of the attachments should be less than 25 MB. If your files are larger, we recommend you upload them to cloud storage and paste the link in your email. As for the Block feature, kindly note that the Block option relies on Spark mechanics and blocks all the emails from the marked email address so that they go to the Blocked folder. You can still switch to the old Smart Inbox and use all the free features in Spark without the need to upgrade. Or you can disable the Gatekeeper feature separately in the Spark settings so that you are not bothered by pop-ups: Spark Settings - Inbox - Gatekeeper - Don’t review, and use Mark as Spam feature for free. In case you have any questions or suggestions you want to share with us, please get in touch with us at support@sparkmailapp.com. We will be happy to assist you and provide further support. Kate