Is @tweet4blood successful?

Its been a year since I launched @tweet4blood with VSR's help. It's not a great geek work, it's a simple two page application based on twitter api. It didn't take more than an hour to design and code the app. But for me its been one of the happiest moment as I was trying to use technology and social media in use.

Ever since I launched it, I have been thinking about its success. Is it number of page views? or news paper coverages? or is the number blood requests? But then I thought number of blood donations made due to tweet4blood is the right measure. Even though I couldn't track it properly, followers of tweet for blood were very kind to send some responses. I am pasting two such mails verbatim here.

1. First Response
"I am a regular blood donor. I always look for opportunities to donate blood the moment three months pass since my last donation. I have registered with multiple blood banks and websites to alert me whenever they need blood of my type in the vicinity. But such systems have turned passive and I started visiting blood banks to donate blood instead of donating it for a person who is in immediate need, admitted in a hospital.

Few months back I came to know about tweet4blood. It is the twitter way of spreading the message for any blood requirements. Since people tweet with blood type, location and phone number, it becomes easy for me to get in touch with the patient and do my best. Earlier, I remember, I used to receive bulk mails for blood donation requests. But things such as tweet4blood have made things easier. My only concern is, India's poor, who are not exposed to communication channels like emails are twitters may be suffering. We need to address this concern.
- @sharadaprasad
"

2. Second response
"Social networking is a lot of hype and little substance. It is difficult to find a functional application of a social networking platform that does not include a heavy dose of self-aggrandizement. @tweet4blood on Twitter stands-out as an exception. It is functional and practical.

How have I used it?
- As a donor, on three separate occasions I have called a mobile number that was RT'd by @tweet4blood
- On all three occasions I was late, despite calling within a few minutes of receiving the tweet!!
- In other words, the person who answered, said the equivalent of "I appreciate the call. We are covered. We have been flooded with calls from donors."

I rest my case!
- @anand_bala"

I know it's not a popular site but I think even if it has helped at least one on this planet earth. It's successful. What do you think?