Social media is definitely used by problematic groups and leaders. Also by predators preying on vulnerable people.
Do you know who she is giving money to?
This can be helpful: [www.culteducation.com
As can this book [cultsinsideout.com
Even though an actual cult may not be involved, a lot of this information still very much applies.
When someone you know becomes involved in a destructive cult there is one rule, which is consistently applicable to any cult situation--don't act hastily or panic. It is unwise to offer any response without first educating yourself--by specifically researching the group/leader in question, the general subject of cults and carefully considering what response best suits your individual situation. After this process of education you will better understand your options and can develop a practical strategy.
You should also consult with knowledgeable mental health professionals, educators and clergy about your concerns. But remember, only talk with those who agree to keep contact with you, your comments and concerns confidential
Whenever you talk to a cult member you should always try to stay positive. Find subjects of mutual interest and attempt to maintain and/or build upon your rapport. Be friendly, reasonable and look for areas of possible agreement. Don't be confrontive, punitive, combative and/or argumentative. Don't denounce the group, its leader(s) and/or beliefs and practices. But this does not mean that you should be deliberately misleading or phony. Don't give false information and/or act obviously out of character. Never use the word "cult" to describe the group or terms like "brainwashed" and "mind control.