Yes definitely e-commerce crypto projects if followed up squarely will really foster mainstream adoption. But funny enough, most have failed in this regard. Let's take for instance, Storiqa is meant to launch their product January but till date no major update. I'm still holding a bulk of STQ though.
That is why its better for a existing program with a sizable user base to transition into crypto commerce like Rewards.com. Rewards.com has been around for years now, has a product, and is generating revenue. If any crypto back loyalty program success its going to be Rewards.com
Currently Rewards team is working on getting listed on top 5 exchange, paypal withdraws, currency conversions and mobile application development. Once these are done and in place Rewards will explode. Especially during the next bull run!