You are confusing me now. Are you frustrated with multiple emails per day from the same user who cannot decide or doesn’t notice they are sending the same message for several projects to the same person? The same person who obviously doesn’t know how work on Viki proceeds and how much time it consumes. So, sending 10 messages per day would result in maybe 5 responses within a week, mostly positive. How is so many available projects all at once beneficial to a volunteer? And just how much is three (or five) per day limiting exactly? 21 per week, 90 per month. It’s a lot actually.
Also, when a person sends me a message they want to translate some completely random episode in a drama, I ask wouldn’t they rather translate the next available episode in that drama, or even another drama. The whole point is that you get an email from a potential volunteer. One is enough. And then the rest of it is up to you, the moderator or CM, how you use the opportunity.