Cap the total number of result rows returned by this run. Results are sold in blocks of 10: the minimum is 10, and any other value rounds up to the next multiple of 10 (15 becomes 20). Every search bills at least one block, and each further block of up to 10 rows bills in full even when Yandex fills only part of it, so ask for what you need. There is no unlimited setting; use a large value such as 500 to collect everything the search finds. Rows fill in section order (matching pages, similar images, other sizes, image tags, shopping matches, knowledge graph), so a low cap combined with several result types can use up the whole allowance on the first type. Turn off the types you do not need rather than relying on the cap.