If people really want a cheaper alternative, all they need is the Odyssey Versa Level 70 putter. By far, that's the best value putter in the Pro Shop. And it's not even close.
The Versa Level 70 is really all anybody needs. It punches way above its weight. And it's a good 2,000 credits cheaper than the Spider. Besides, if someone is willing to spend almost 4,700 credits for a putter, I seriously doubt that they'll quibble over another 300.
Moreover, in my opinion, the small difference in cost between the Spider and the Sabertooth is far outweighed by the fact that the Sabertooth is available long before the Spider. I would guess that it would take most people the better part of a year to level up from Level 98 to Level 101.
I suppose if someone is already at Level 101 or above and hasn't upgraded, then it's worth taking a look at the Spider. Even so, because of the time to get to L101, I suspect most people would upgrade to the Sabertooth instead of waiting, if they were thinking of upgrading. And I just don't see anyone replacing a Sabertooth with the Spider. Well, I don't see rational people doing that. :-)
So, we're back to where we started. WGT's placement of the product seems odd (IMO).