Congrats on shipping! However:
You don't prove the validity of a startup idea by asking a community of startup enthusiasts whether they think it's valid (except if it's an idea targeted to startup enthusiasts).
It's the same as getting validation from your friends and family: next to worthless.
People who make up the Upboat community and the potential customers of your startup idea are very probably different. And they're going to have wildly different opinions on the validity.
What you should find out is whether your potential customers think it's valid.