No, XFunge works with anything from an Excel Spreadsheet to a large scale CRM.
The tickets or membership cards carry more information than a normal membership card and are always available in the users smart phone.
Yes, XFunge is very cost effective, the price goes down the more you use, and there are no postage costs,
Yes, users can have memberships with as many organisations as they need.
All tickets, memberships and redeemables are minted on the blockchain as an NFT. When a user scans an event pass a notification is received on the users phone asking if they want to redeem their ticket. So you are unable to use the same code more than once and it can only be used by the correct user on their smart phone.