Respect Workers' Email Inboxes When Notifying Them of Bang Tasks

[xehu]

We're getting a large number of workers who email us telling us to remove them because we've spammed their inbox up to 13 or 14 times per day. We should be respectful of workers' inboxes.

Suggested fixes:

• Send a summary/digest notification with multiple possible links that they could click
• Use alternative, non-email notifications, for example, given them a dashboard where they could check the tasks they can currently join, but don't spam their inbox with each new batch added
• Schedule events to happen at a specific time of day and notify them when they have been scheduled so that workers know what to expect and don't need constant notifications.

[tawnzz]

I think @madewithsmiles is also planning to create an unsubscribe button!

[deliveryweb]

partially done, limit and login links.

[madewithsmiles]

Done and tested (in sandbox). Making a pull request.