OK - this is all odd.
My campus switched to priority away from accept/regret my senior year.
We definitely still re-invited people. And were encouraged to even more than we had been during accept/regret time, because it looked less pathetic - with accept/regret, they would see that we kept inviting them back and they'd keep regretting... with priority, if they kept going to other groups, they'd never know they had an active invitation with us. They would only see it in this scenario (using my campus's numbers)
Round 1 they went to all 5 houses, and they ranked my chapter lowest
Round 2 they went to 4 houses - all their top choices
Round 3 they went to 3 houses - only two houses cut them, so they ended up back at my house
Most people didn't experience that drastic cut - most people would be released upfront the first night - so they would never know we were still inviting them. Only a few people would "slip through" so to say, and helped boost our numbers.
That said, we tended to release people if they had not attended our house for two nights in a row.
But our Greek advisors would actually get on us about that because it was usually exceeding the number of releases recommended by Panhellenic!
I'm probably saying too much here, but honestly it seems like what happened at my campus is the opposite of what y'all are saying.
Frankly, though, that could be 'cause y'all are talking about UGA and I'm talking about teensy W&L.
