I foster. I got into it after reading up on it on here although fell into sighthound fostering by accident.
A local man where my Dad walks his dogs found a lovely wee staffy girl and handed her to the pound because he thought it was the right thing to do, when he talked to my Dad about it and found out about the 7 day rule and the conditions of the pound he begged my Dad to help this dog, he couldn't bear having to sleep at night wondering if he had sentenced this lovely dog to death.
After consorting with me to blackmail my mum who only wanted one dog i.e the one they already had, he went and collected this Staffy from the pound.
Sadly she came back to us with Parvo and died just a day after we saved her 
My Dad was appalled at the way this was handled by the pound and their refusal to vaccinate the dogs in their pound or even warn people. His own (vaccinated) dog contracted the disease and almost died himself, thankfully due to having been vaccinated he got a milder form and lived.
He decided he had to do something and so Googled for local rescues/animal welfare groups who might be able to help him. He found one rescue who sent someone out to talk to him, although they had a working relationship with the pound and did not want to rock the boat for fear of not being allowed in to take dogs into their rescue after the 7 days, they did explain to him about the work they did and how he could help. Later that week he fostered a Whippet. He still has her, he is a failed fosterer 
While they were there they asked if he knew anyone else who might help, he mentioned I was home checked to foster for a national rescue, but rarely if ever got dogs in from them owing to how far away I was if anything went wrong and I would need the dog picked up immediately, they had to be certain they were giving me dogs who would cause no issue with my two existing dogs, my cat and my children.
They took my number and got in touch with me and sighthound foster number two is currently sleeping on my bed 
My Dad no longer fosters because he later found another dog straying while on his walk, who he refused to hand to the pound (he did report it and take the required action to locate an owner, but no one came forward) the stray ended up staying with him permanently also. He still does help with fundraising and events.