Do most position monitoring services use XML limits or do they parse regular Yandex results?

Question

Search Engine Optimization

There are opinions that the positions of sites in xml.yandex differ from the usual issue. What is known about the data sources of numerous position monitoring services - do they parse xml or somehow bypass protections for parsing regular output?

Answer 1

Limits, parsing the search will constantly defend itself, throw out captcha, block IP for some time, in short, there will be more steam than you have to parse.