If they are like many of the mega churches in the US, they are part of the emergent, seeker-sensitive churches that emphasize entertainment, self-help and pop psychology over Scripture. And Jesus well tell them “I never knew you.”
I don’t think you fully appreciate the danger Christ followers face in some places in China.
The book I recommend at the top of the thread is very enlightening in that respect.
At the very least, let me ask that you pray for these people who are exhibiting bravery in worshiping Jesus in the face of a blatantly anti-Christian government. I can tell you they aren’t Joel Osteen followers....many of them are facing prison, persecution or worse.
May we have as much grace to face down the dangers these people face for following Jesus if/when that time comes.