Why are banks cancelling credit cards?

Adams County Bank 5 Bank of Farmington 11 Banner Banks 4 BENCHMARK Bank 16 BMO Bank National Association 19 BOKF National Association 13 Century Bank of Kentucky 6 Citizens Bank, Edinburg 2 CITY State Bank 8 COMMUNITY National Association B&T TX 15 Cottonport Bank 5 Farmers State Bank of Western Illinois 4 First Bank of Owasso 3 FIRST ST Community Bank 11 First State Bank of Michigan 2 Legends West Bank 4 Midwest National Bank 2 Minnesota First Credit & Savings 4 Neuberger Berman Trust Company of Delaware, National Association 12 State Bank of Chilton 2