'Vechten' here refers to competing on price. E.g. what we would call a budget store/airline/telco/etc. in English is known as a 'prijsvechter' in Dutch. 'Hechten' refers to bonding.

The construction is typical of the shorthand style of signs and notices often found in Dutch shops, e.g. "3 halen = 2 betalen", "aanraken = kopen", "op = op", etc. [the equals sign is pronounced as though it was the word 'is']. So to make a full sentence out of it, I'd say something like: 'the way to keep customers loyal is to keep prices low', or something along those lines. Whatever fits best in your text.

-> "De versproducten van prijsvechters Aldi en Lidl bevatten veel resten bestrijdingsmiddelen."
http://www.weetwatjeeet.nl/persbericht22jan2004.html

-> "Prijsvechters vliegen vaak vanaf kleinere vliegvelden. De kosten zijn daar laag en vaak kunt u gratis parkeren. Hieronder vindt u een overzicht van de vliegvelden in en rond Nederland met low-cost airlines die daar vertrekken."
http://www.rugzaktrips.nl/prijsvechters.htm