Dave.

, couldn’t the brokers just filter the period when i started clickning everything?

They don’t care about the quality of an individual profile, it’s the quality of the aggregate data that’s important to them. If anything, your profile might be identified as an outlier compared to the average and simply discarded. They’re not going to look any further than that and try and “rescue” your data, they’ve got a million other profiles to sell to advertisers.