Where other couples set up?

Gemma and Mark have been set up to meet, fall in love etc. (there was a Lumon logo in the blood donating scene), in order to have two 'lab rats' for the testing and so on. I wonder, would a global company like Lumon put all eggs in one basket? Given the resources, must we expect more Mark-Gemma like couples who where set up, split up again and used for cruel experimentation? Was the whole testing floor only for Gemma?

add on Q: whose "data" where the others refining? Where they any good at it?