inclusion of links to Fireworksland.com and Pyro Universe 

There seems to be some disagreement on whether links to Fireworksland.com and Pyro Universe should be included in fireworks-related article. These two links were included for some time, but were later removed as "spam." While the sites do sell products, they are not inherently commercial in nature. They do, however, provide large amounts of detailed information on fireworks.

Therefore, I'd like to gain a consensus on whether these links should be included. Thanks.

Personally, I think they should be included, but that's just me.