Critical Reasoning (CR) | Re: QOTD : Smithtown University’s fund-raisers succeeded

Hi Experts GMATNinja GMATNinjaTwo
Can you elaborate contrast in the sentence starting with: In the contrary ...

As per my understanding, this sentence tells us that since people who have donated presently are one who did so in past, good fund raisers constantly try to make an effort to convince people who are less likely to donate so that their donor base is expanded.

What's the contrast here? Also as per me, only the last sentence in argument is the main conclusion (An answer to Q: What is