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I 've been using {{USERNAME}} to earn up to 20 % back in Bitcoin at major retailers when I shop via the Lightning Network . I got us 20,000 satoshis each of free Bitcoin when you sign up with my invite link and make a purchase . {{URL}}
 Bitcoin, Lightning Network, 20,000 satoshis, Bitcoin
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: group, creative work, person, event, product, location, corporation 
Text: {0} 
Answer:
 Bitcoin, Lightning Network, 20,000 satoshis, Bitcoin