I plan on making a few small tips to large businesses and entrepreneurs to see if it sparks any interest or response from them. Let's see how it all goes
If they don't claim the tip, does it just stay in my ChangeTip account? And does the tip I send them ever expire if they don't claim it after xx days?
Yes, all tips remain in your account until the receiver claims them and if you decide to cancel an unclaimed tip, you can.
"a. If the tipper has funds available, and tippee has already connected to ChangeTip, then ChangeTip executes a free off-chain transaction. Both tipper and tippee are sent messages confirming the tip has been delivered.
b. If the tippee has not yet connected to ChangeTip, then the tippee is sent a private message with information on how to collect their tip, and tip will be listed as 'Out for Delivery' while the tippee gets connected. If the tippee does not collect the tip, then it is refunded to the tipper automatically after 15 days."