The only concern that came up on the enwp discussion was to ensure that someone could not overload the tool with either rate or size of test cases, with a corresponding effect on the wiki itself since the tool does run the regex against the live database. So some sort of rate limit or query condition limit may be desirable.

In T125459#2372291, @kaldari wrote:

API usage yesterday was only 1,186 queries :)

The last logged hit from CSB on the WP:SCV page was 01:21, 8 June 2016 (UTC). So either the bot is not running, or is not hitting the API properly/successfully. This may account for the dropoff in API hits?

@kaldari @Earwig As a consumer of both tools, I can say there have been times where looking at the raw search results would have been useful, to know what was searched and what wasn't from the article text. So if that helps meet Bing's TOS, it wouldn't be wasted effort from my POV.