We love people who love us back. We give our campaign money expecting something in return. We attend church as long as there is something in it for me. We dare not commit ourselves to joining the church, we might be asked to contribute. So we follow Christ at a reasonable distance, and dare not get too close.
Moderation is the word.
No, Mary's loving care for her Lord was done without counting cost. Mary could have chosen a thousand different ways to use that precious ointment, but she would have missed her Lord's words of affirmation and assurance that she had chosen the better way. Chances are that Mary discovered that the love she found was worth everything she gave. Chances are, we would, too.