It would have been informative to have read what any other lender might have had to say on their experiences therefore hopefully some may find their way to this thread and would think about commenting.
Sure, I'll bite.
1) What is the lowest or smallest ever amount you have loaned out
The smallest amount I can remember was 0.01
BTC back in 2016, so it was around $7 USD. I might have done a gas fee loan at some point but I don't recall a specific instance.
2) What is the highest or largest ever amount you have loaned out
Somewhere around ~$20000 when loaned out. I'm guessing the value for that loan peaked at around ~$30000.
3) What is the approximate ratio between loans with collateral being unpaid and loans being fully repaid
No clue. Somewhere in the neighborhood of 1:10 just because of a single default and a low number of collateralized loans.
4) What is the approximate ratio between loans without collateral being unpaid and loans being fully repaid
1:160 on the current iteration of
my lending service. (or I guess 1:110 if you include a loan I privately gave to yogg)
5) What is the approximate ratio between loans that are fully repaid on time vs fully repaid but not on time
I consider all loans as on time since interest is calculated on a daily basis
6) What is the biggest profit you made on a loan
There was a loan where I profited around 0.15
BTC. I can't remember if there was anything larger.
7) What is the biggest loss you have incurred as a result of non-payment
0.23
BTC, though this was while the price of Bitcoin was under 10k.