I think that comments on your answers should give you alerts too. There is an option to get an email alert for it but I don't know why it doesn't do it for the site alerts too. If you have site suggestions you can use the contact button at the bottom of the page. The blurtit team are busy but it may be something that the programmers can do in the future.
What are some things that you would want to change about Blurtit? I would make it so that comments on my answers would be in the Alerts.
I agree with Maxine as i follow quite a lot of people and vice versa and lots of answers are deserving of helpfuls and i always feel bad about leaving someone out.Ten is too small when you look at the number of Questions and Answers being posted on a daily basis.
I would add a limitless of helpfuls.. 10 is too little.