Is it normal for a plugin to suddenly blow up?

A small while ago I made a plugin for making a billboard gui on a character/NPC, and when i looked at my “Sales of Goods” tab in my transactions, i saw 3 and a half pages of plugin sales from lots of different accounts that seem legit. These purchases have been spread out since the 14th of October and is still on-going. Is this normal?

Sorry if this is the wrong topic since I didn’t know which one to put it in.

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i guess some youtuber made a video about it and people realised your plugin and started to use it

Same happened to me, just with shirts.
A shirt I made for my game without any advertising or telling anyone.
Then got like 14 pages of purchases recently.