Question in regards to card randomness

[MynameisMUD13]

I have a question in regards to card randomness. I was reading a post on this forum sometimes earlier and someone was saying how the online poker sites make drawing cards more likely to to show in order to encourage action to build bigger pots with bigger rakes. Is there any truth to this and if so what is your source for this information? Can the cards be truely random if they do this?
Thanks,
MUD