Do lifetime deal buyers usually drain way more support than regular subscribers?

Ran a lifetime campaign a while back to get some initial cash and early testers.

It definitely helped with quick revenue but now those one time buyers take up almost all our daily support energy.

It feels like we spend way too much time fixing issues for non-paying users instead of focusing on building proper recurring revenue.

For those who ran LTDs early on did the upfront cash make up for the support headache down the road?