Yep. Some viewers don't realize that it is all fan-subbed. But maybe even when they know it is fan-subbed, some may still complain.
You may have a look at this thread/discussion about good/bad quality and participating as a volunteer:
If they start paying for segmenting and subtitling, they need to proof the quality first. Probably, not everyone who may be participating now would be paid. If only some get paid and others don't or if only certain languages get paid and others don't, I fear the whole community system could fall apart.
Let's assume every language has at least 50 active members, maybe more. 10 languages x 50 = 500 people. Some dramas have almost 20 languages => 20 x 50 = 1000 people.
Remember: VIKI is free to watch. For some dramas (episodes) viewers without a pass need to wait longer, and just very few dramas are VIKI pass exclusive.
So they should pay for licenses, for segmenters & subbers and offer free Asian dramas to viewers worldwide. I don't think that'll work on the financial aspect if they need to pay for ~1000 volunteers. It would be more efficient to hire professionals who do segmenting & translation for their living/as a daily job, bc they won't need ~1000 people then.
Besides that I understand VIKI's idea as a platform for fans from fans. A legal place to watch Asian dramas worldwide for free (In contrast to other fan projects that do subs for dramas but without having a license for it).
Many communities with fans are built around a company and a certain kind of interest, e.g. around games. There are some games that wouldn't be that popular without a huge amount of fans who create content that is usually 100% free. Some fans (now) have their own patreons as supporters but mostly because the created content needs so much work for a 1-fan-factory and the fans do need to earn money for a living as well. So if a fan content is really popular they start a patreon page to be able to continue that fan content. Sometimes the fan content work becomes a living job, when the fan project is large, ongoing and with many supporters.
When VIKI viewers want faster subtitles, they should start to support a/their team to do so. (I don't know if that is against VIKI's guidelines/rules but I could imagine this as a method for a "paid" volunteer system that rewards volunteers with money and keeps VIKI a free to watch platform).