The core of Optery's search functionality is "person" centric. Meaning we start with searches by name, city, state, and age to find "you" regardless of which underlying email or phone number the data broker has on record for you. Because in many cases data brokers may have no email or phone on file for you at all (only home address), or they may have a really old phone or email you have forgotten about. When data removal service scans focus only on phone numbers and email addresses, a lot can get missed. Many people search sites are not even queryable by phone or email, and are only queryable by name, city, and state. Optery does search for phones and emails, but you are correct in that it currently limits them to just one each from the customer at this time. We plan to release the scan on demand feature you referenced in the next few months.
That said, Optery recursively searches through data exposed by data brokers to alleviate the need to input numerous old phones and emails by the customer. In PCMag.com review they said this of Optery's recursive phone number search functionality:
"It uses data found in data broker profiles to recursively expand its reach. For example, in my latest testing, I only gave it my current phone number, but it found records associated with an old number that I used for some 25 years."
source: https://www.pcmag.com/reviews/optery