WI has been under control of democrats for a long time before Scott Walker. These laws in WI for recounts seem to be tailored for the purpose of stealing elections.
The laws appear to be fairly open ended. A reasonable expectation that you can win an office on the basis of the recount should be a requirement for standing, and this Stein cannot assert.
I do not think that they have any real expectation of overturning the election. They are angry with the voters. They are acting out and just want to shriek and rattle the bars on the cages and throw poop at everyone. (They want to create an impression of “Fraud” to “De-legitimize” the election.)