Perhaps we could merge the two into a single repeat-visits tag?
The Usage guides are:
visa-run: Leaving a country for a short time in order to renew your visa or obtain a new one.
repeat-visits:For questions about repeatedly visiting a given country in a short period of time. E.g. visiting the UK three times in a row on back-to-back tourist visas.
The concepts are different (for the former the sole purpose of travel is to 'requalify', for the latter it could just as easily be the need to be somewhere else between visits or any one of very many other reasons).
In any case, visa runs seem by definition on topic at Expatriates:
Questions about work, residence, student, investor and similar mid and long term visas aimed for staying in the country for more time than a tourist or short term business visa would allow
while raises doubt as to whether on topic for Travel (though I am well aware some questions may be on topic at more than a single SE site).
Merging the two would not be a good idea.