How is this spam? Are tiny transactions like these considered to be spam?
The transactions have a public note on them, saying their website. Blockchain also has a feature to label addresses, and Laxo Trade is using an address which is labeled with their name and website.
The public notes are actually only available if you use the blockchain.info block explorer, otherwise they will be invisible to you (they are not actually on the blockchain).
Most importantly they are paying an appropriate miners fee therefore are essentially paying to help keep the network secure