Model 1: ecommerce. The website exists to sell your product. Having an alternate version is a simple cost/benefit decision: will people buy your thing from a low-overhead site? This may be combined with a mobile-friendly rendition.
Model 2: advertising. The website exists to catch attention long enough to show ads. You need seven tracking systems and eleven ad networks; all of them need JS and graphics and won't make money for you otherwise.
Model 3: public service. The focus is on providing information, not on making a sale or showing ads. The benefit of a low-overhead version is clear, but you need to keep the costs low, so you can't spend much extra time or money on it.
Model 4: SAAS. The website is the service, so user satisfaction is the top concern. Understand how your users want to use your service, and provide that for them.
Model 1: ecommerce. The website exists to sell your product. Having an alternate version is a simple cost/benefit decision: will people buy your thing from a low-overhead site? This may be combined with a mobile-friendly rendition.
Model 2: advertising. The website exists to catch attention long enough to show ads. You need seven tracking systems and eleven ad networks; all of them need JS and graphics and won't make money for you otherwise.
Model 3: public service. The focus is on providing information, not on making a sale or showing ads. The benefit of a low-overhead version is clear, but you need to keep the costs low, so you can't spend much extra time or money on it.
Model 4: SAAS. The website is the service, so user satisfaction is the top concern. Understand how your users want to use your service, and provide that for them.