I totally get what you are saying Silc, but also have to view it from a different perspective.
On the basis of not taking a bonus, how likely is it that a player depositing $25 or $35 will ever hit anything? As we all know, but cannot prove, the system will most likely suck you dry until you have made x amount of deposits into this system, before giving up the win that may equal what you have already spent.
Now we have also seen, players that take bonuses, for some uncanny reason may hit a random or a win equal to a random, usually early on, this is my suspicious mind speaking here, but therefore the player now has a huge bankroll to work through the wr.
The money won is not the players money until the wr is met. It's also not extra money the casino wins either as it is virtual money that doesn't exist, kind of like the US dollar.
9 times out of 10, I think from what I have read and followed on this forum, this is how the system works. Make your deposit without the legal attachment of a bonus and you will be "virtually" screwed most of the time.
Take a bonus that is reasonable, have a good win and manage it in your favor and you have a good chance of coming out with some real money after dealing with the virtual money.
Or you have the chance of being tagged a syndicate for having the brains to play the bonus in your favor instead of getting reckless, making high plays on tight games, hoping for that mega thousand dollar win.
Unlike B&M's, online virtual casinos, I believe have the ability to micro manage every player out there and does adjust automatically according to how one plays and wagers.
So to keep the myth of random behavior alive and well, some will win a random or a regular nice win on a deposit alone, most will not, same with taking a bonus, some will, some won't. But either way a player has to manage his budget when playing that gives him/her the best advantage.
But this is just my distrust speaking for a system that is computer generated in a virtual world that has no building I can walk into, a machine to sit in front of and actually touch, people milling about, noises all around, bells and whistles going off as some players scream for having won a jackpot and we can turn and look at that person jumping up and down in excitement. You see it in a B&M, hear it and feel it. In the virtual world where it is an illusion on my computer monitor, I don't know if it's real or not, except for that very rare withdrawal that mysteriously arrives in my account to perpetuate the illusion that maybe it's real, so keep feeding it, but how can I be sure of anything so untangible.
JMO
... Take the comment as you feel, Ignore it or use it... up to you. No conspiracy here, so don't bother lambasting me for evidence... 
