1) Retailiation represents a kind of retail or consumer competition amongst or between retail establishments (brand, store, company).
Retailiation is a very specific 'brand' of retaliation: economic retribution exacted by one retail establishment (brand, store, company) against another.
2) When a shopper, purchaser, consumer is displeased with a retail establishment, for whatever reason, the person exercises retailiation by refraining from shopping at a particular retail store or company, or by spreading to one's personal networks information about the displeasurable experience.
A boycott of a retail establishment (brand, store, company) is a kind of retailiation.
Note: This word, retailiation, is often a typographical error when the intended word is "retaliation."
1) To the delight of drivers, the two gas stations on the same corner engage in perpetual retailiation by continually undercutting the other's prices.
2) Because some people disagreed with the position of a talk show host, they exercised retailiation (i.e. they retailiated) against the show's sponsoring advertisers, until the sponsors rescinded their support.