They "search" by using HomeInfoMax for a $15 per lot report.  Their goal is to play the odds that their vesting deed falls within the 1985-current range of HomeInfoMax, transcribe the data and call it a day.

 The ones that they can't get a chain for, get pushed to a local abstractor with the sales tag of being an "easy walk-through" for $30.,...hell, you'd be plum loco to pass it up (in their spiel).

 In reality, these are searches predating the effective range of the county database and are lots held since the 60's and 50's involving fiche cards, microfilm and old tomes. 

Their paradigm suggests that they find any matters of record that are easily and readily located, so they check HomeInfoMax.

 Remember that DataTree & DataTrace are First American Companies (information services division) and they sell their database info (only parts of it, technically) to HomeInfoMax, SiteX, DocEdge and other public subscriber-based firms that repackage the data for users.

Remember also, that in many cases as the "joint plant" system of title companies became privatized to LLC's, First American bought up the firms to create it's information services division.

You DO remember this, RIIIIIIGHT??  lol.  thought not.