Those skills already drop.
No, those are cheap on the market. They cost a few thousand ISK and would not at all improve the reward situation in Data Sites.
No, those are cheap and available on the market and would not improve the reward situation for Data Sites at all.
What you ask for is yet another hit to the ISK sinks of EVE. EVE does not need more reduction in sinks.
You also do not ask for more variety, you just ask for a cheap and uninspiring addition of already widely available things to the loot table that does not improve anything at all with regards to the reward situation of data sites.
Do you want to know what would improve the reward situation? This:
and you even had this suggestion in the topic that you linked. This would add true variety to data sites because the items would drop only in their respective domains. It would also set data sites apart from relic sites and give them a unique item pool that has a big demand in the economy, which in turn means Data Sites are worth running again and necessary to be run instead of just being a fly over site that most explorers and exploration bots ignore.