I ran a little experiment about X's algorithm (Patreon)
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These pics were posted with the same pictures, at the same time, with the same text, and reposted after 12 hours. Except one with an external link and the other didn't have it. Data is collected after 24 hours and Here's the result.
Frieren's pic : 52/762 = 0.068
Spy X Pansion : 32/606 = 0.053
Algebra girs : 26/310 = 0.084
Mean result = (0.068+0.053+0.084)/3 = 0.068 Or 6.8%
The conclusion is "If you insert an external link in the post, the engagement of your post will be reduced by 93%
which is quite low compared to what I heard last year...it quite shocked me. 93% engagement lost? That's Hugh. But at least I know.
So if anyone wants to post anything in Twitter, this is the condition you have to consider.