Lotus as a brand, which has far more street awareness and is always cash struggling. I only knew of Zenos, as I saw one locally about last summer time and had to google it, so not that actually out in the market, particulary well. It has to fight the usual fully built cars such as Caterham R's and Atoms , which both have massive brand awareness. The TG and GT may have made more people aware, but as a market , it was going to be a massive struggle. I nearly bought a Ginetta G40r before building a Westie and even with TV coverage on touring cars, most people wouldnt know of them. They only built a handful of road cars in the end and then refocussed on their race cars, so it didnt hurt them. Maybe the consideration for buyers on potential resale is another thing, with Atoms and Caterhams both holding strong money after the owners want to move on. With the Zenos that may also have been a hidden loss maker.
Its a shame that it has happened , but marketing and actual selling these types of cars is always going to be micro niche.