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But if you do really mind of think realistically as a business owner who do really become big and known then its impossible that they would really become scam in the end.Yes, they could scam out funds
but that would really be on one time unlike if they would really be still continuing to give service then they could make out revenue for long term which is more profitable for them.
So its really a bit rare or not really that too often on seeing known platforms or sites to become scam specially if they do make themselves big.
So its up to someones risk taking factor.
Yes, it just takes a bit of longterm vision to know that it's better to profit a bit less but for a long time, than to scam once and go out of business, ruining your reputation
and of course there's ethics which should be a main thing to consider but unfortunately a lot of people ignore it.