Ukraine has trillions of dollars worth of resources that Russia is attempting to take. Including more gas, coal, etc.

When Russia started the invasion in 2014, the EU kept buying Russia's gas. In fact, Germany expanded it even further with Nordstream.

So again, was that supposed to be some kind of gotcha? Because obviously gas sales have nothing to do with the incentives: Russia believed they could profit even more with an invasion, and get away with it.