I have a similar problem than this: http://sourceforge.net/p/tcpdf/discussion/435311/thread/32a59ca0/ Developer answered to ask a lawyer but it costs money... a lot?
I only use TCPDF, I have not edited it. Software takes input from users and makes PDF files based on that. It will be used commercially as a service so user will have an account and code will be on my server.
So the question is, can I use TCPDF commercial - I think I can since it is LGPL v3 licensed and these couple of sites like choosealicense and tldrlegal said I can.
So is there anyone who knows and understands this law text.