"so what?" you expect people to text everyone they know and convince them to use an app they never heard of for texting? Good luck.. hope that works out for you.
You don't need to convince everyone. Someone earlier in this thread said they wanted to send a video to their mom that wasn't shortened or resized from MMS.
"Mom, can you install this app so I can send this video?"
You aren't sending videos or group chatting with everyone in your address book. You can still chat over sms text with those other people. The people you want to send videos or do group chats are most likely people that are close to you, not strangers.