Right so there are three likely ways it works. I don't know which, but I suppose there might be other ways to make this work.
Personally, I see a few problems with Skillsofts. The first is that they are a way around UE caps. It allows specialist characters to be amazing at what they do, and then get to good enough at support skills. For me... this should be discouraged as much as possible because it's an automated solution that discourages RP. I need to have a TV installed... I can hire someone (possibly shady) to do it, or I put in a high enough chip and just do it myself. It doesn't matter if they're not as good as another installer as long as the soft is good enough to get the job done.
So here are the ways that I can conceive of Skill Softs working, speculation only and trying to cover ways to give ideas if I'm right on any of them.
Flat Increase:
This just gives you a letter in a skill. The better the soft, the better the skill.
Pro: Max capability is capped.
Con: Highly skilled users have no real use for it.
Con: Allows people with no investment into a skill to be good enough to not need characters for many tasks.
Point Increase:
Adds a number of points to a skill. The better the soft, the more points added.
Pro: Everyone gets a benefit.
Pro: No one can get amazing without some investment in a skill
Con: The higher your skill the more you benefit as you are bypassing the curve.
Con: Allows people to encroach on specialists with having to invest massive UE.
UE Increase:
Adds a number of fake UE to a skill. The better the soft the more points added.
Pro: Everyone gets a benefit.
Pro: No one can get amazing without some benefit with the skill
Pro: Low to mid tier characters get more benefit than pros because of the curve.
Summary
For me. The last option works the best. You don't encroach on people who invested while giving a very low level ability to people with no investment. It benefits mid tier characters more. You can't be great or even professional at a skill without having some investment into it already. So basically it becomes a chrome version of a catchup mechanism but even people who are way into the curve might see a little benefit for still using it without pushing them over the top compared to everyone else.