I'm far from an expert, but I'd guess a lot of start ups would use CNs. They don't have established revenue, so financing options may be limited.
From what I've been reading, there are pros and cons to CNs.
For start ups though, financing is always required until they are able to make money from selling their product, TV2 are no different.
I think the more important question should be:
Do you believe in the product TV2 offers?
Do you believe management when they say they can get us to where monthly invoicing exceeds monthly expenditure?
If yes to both, just hold/buy. If no, then may be best to sell your shares.