I just let two turtles go to make room for a newborn rattlesnake i found. Used to have a sugar glider i found in my backyard. I usually keep stuff a few week/months and alternate it out with new friends i find.
Im in the process of moving to a forest i bought so ill have more room for more tanks, and more time outdoors. I only keep as many as i can keep thriving instead of surviving, of course. But when i need to downsize i usually let stuff go in my forest.
It started when i found out my family and neighbors just shoot all the animals on sight so i started rehoming them