It ended so I couldn't check out the link but if you're talking about the ones with the spiderweb collection, I was thinking more about the work put into the game. There are multiple games that can have low graphics and there are the Witcher 2 that have high end graphics being one example. Then there is the Ultima series which are older low graphic games but are more of a classic than Indie games.
I don't know how GoG works though but that sounds great if the site doesn't bias based on title reception and perceived title demand so long as there's enough Indie bundles that were still bought through it. I was just looking at it the other way. If I was a customer, an indie bundle being cheaper in the list could make me considered taking a risk at checking it out over a popular game if the quantity looks to be a better deal. Remember these are promos, someone will still more likely wait for acquiring a popular modern title or support an aging classic in the future than go back and re-consider paying for indie titles in full. It was also an attempted side remark on how crazy indie prices work sometimes.