Sending my used printer cartridge to recyclingfactory.com

I requested 10 free envelopes

Update : you have to reach £20 before you get a payout. It's hidden in the small print.
When you send a cartridge, after about 10 days they send a confirmation email

Catch number 2 : Most of the time they only pay for 'original branded' cartridges. If you send an empty cartridge of their own recycled brand you get nothing. If it comes with an envelope in Tesco you might get clubcard points.

therecyclingfactory.com
send your used printer catridges, laser toners, or mobile phones
get cash (see quotes on website)
postage is free
goes in your nominated bank account
score : 10/10 (if they pay you)

Recently I had to buy a new black cartridge for my Hewlett Packard Deskjet 1050 printer. Looking for the cheapest possible price from a 'physical' shop in a limited time, I chose a Tesco own brand. When I opened the package I found it to be a recycled cartridge from the therecyclingfactory.com (I knew it was recycled).