The porn scene in europe is very different than in the US. Yes there is more girls who are willing to try it out for a start. And there is a lot of "porn producers" going around in those countries. Look at Woodman, he became known by doing that, shooting eastern european girls all over the place etc. Its also true they are more open minded in general. Its kinda rare to see an euro girl not shooting anal. So maybe indeed it pays less, i don't know, i never looked at the numbers personally. But i would seriously doubt 100 euro a scene is "common".
One thing for sure is that its better to not compare industries like porn from country to country. In Montreal we have lots of pretty escorts, in Toronto there is even more in term of numbers, yet the Canadian porn industry is one of the smallest there is. Companies can barely put out 1 scene per week. And you got AD4X that seem to release more of their amateurish "casting" than actual porn scenes... (Wich lets be honest, its just a way to milk content at VERY VERY low cost) Sometimes you have a hot Canadian that become a star. Nikky Benz, Capri Cavalli, Savanna Styles ... But there ain't a lot of them. The thing is, as much as porn can be more interesting for girls sexually (male actors are usually fit etc) it puts a big burden on their life as once its release, its released forever. Also you can't live from porn in Canada... unless you are excellent at marketing yourself and manage to fill the gaps with onlyfans, caming, strip club touring etc etc.
So yes the euro porn scene is different, it is what it is.