Stoke striker Campbell, 19, had failed to complete 90 minutes in his 13 previous Salop outings – 11 as a starter.
Town fans were speculating that Campbell, who has regularly been switched with top scorer Fejiri Okenabirhie, had a clause in his loan to not play a full match.
But the hotshot played the entirety of Town's 1-1 draw at Coventry on Sunday, the point required for Salop to secure their League One status.
"A lot has been made about this," said Ricketts. "Football is what it is. Up top, especially when you've got the forwards we have, you like to keep it as fresh as we can.
"If it means fresh legs for the last 20 minutes in games then you generally do it.
"It was good for Ty to feel the 90 minutes. He's a good player, only young with loads to learn, but he's had a great impact for us since coming in January.
"I don't count the minutes he plays but it was 90 for him on Sunday."
Campbell, who netted a brace for parent club Stoke in their January FA Cup replay defeat against Shrews, has five goals in 14 games for Town since he joined on deadline day.
He has been watched on by dad and former Premier League striker Kevin from the stands while with Town.