Why have pokerstars given me an "admin Credit" 2 times in past week?

Hi all I've googled this and also emailed Pokerstars about what this admin credit is? Obviously I'm not complaining about it but just curious as to where its come from.

I've never received an email from pokerstars as to why and they aren't huge amounts. I googled it and the most obvious sigh is collusion or inactive accounts, however my account isn't inactive. I've played most days for past 3 months, so collusion looks about right?

The amounts if interested are 2.20 and 5.00 if you can pinpoint these amounts to anything.

Thanks in advance

Keep quiet, buy yourself something nice

It's most probably a case of collusion in a tournament which you have participated and the buy-in has been refunded.