nostr:npub18zycp0v78znsv3lnkpfc7w6qt2xc28cnmnu3jsjwj8lffypmph4qjjw3yk nostr:npub1psaqlqsvwy5puz0f7jqts384fxpgj3zcxmpe99hrd4uvs5mq20tqgfxhme can I measure how effective it is?