We have maid. but in case need 99 to help. (Actually when we waited for the new maid, 99 and my dad both take care baby on day time), my husband never mention to them about have pay.
We already gave them 家用. besides. they don't have work. So take care of their grandson, they should not ask for pay. If they need pay, my husband said he rather gave more money to other people to earn. But they don't think they can see the grandson anymore.
But of course if they have their job and need to quit to handle baby, we must pay the same. But this is not my case.
I must be one of the few people who would like my mother-in-law to help take care of my kids. She has a university degree in early childhood education and is really good with kids.
However, it doesn't matter how much we will pay her, she doesn't want to take care of my kids as a job, she spends her time enjoying her social life.