I thought so too. I have been following their repo at: https://github.com/stratisproject/StratisBitcoinFullNode, and they are highly active.
As it has been mentioned before many times, their marketing haven’t been very visible.
It all looks super cool, and their tech is amazing. Its gonna be awesome if the C# community starts looking at it.
However i do think that many investors, exchanges and others, look for more than just cool tech and lots of code.
Its very easy for a cryptocurrency (However good it may be), to be lost in the vast sea of other coins.
Oh marketing! People forget that they can't take their foot off the gas or people forget about them.