How cheap is real cheap? If less than $2.85 each, then they are a deal and fine for a 5000 mile OCI.
The reason for the $2.85 cut-off price, that is the price of the SuperTech filters at Walmart that are the same thing.
I have a ST2 (same as the 27899) on my truck right now with no concerns. While some complain about the unknown efficiency @ 20 microns (estimated by some to be around 68%), it is at least as good as most OEM (Toyota, Hyundai and estimated around 50% @ 20 microns from what I have read). Others complain about the combo-valve. While I am not crazy about it, it works and has not caused any issues that I know of for me.
I think it could be a problem in extreme cold and long intervals due to it being nitrile, but for me (almost never gets even too freezing, much less below it, and ~5000 mile intervals) it is fine.
Help save the landfills by buying the mid-level Frams and mid-level Wix, then use it for two 5K OCIs. That would also include the NAPA Golds.
Why are you putting you filters into the landfill? AZ, AAP, O'Reilly all take used filters around here, as do many city and county facilities.
For me, I cut them open and all metal goes into recycle bin. Media itself (with almost no oil left on it) goes into regular trash, although I have been debating using it as fire kindling out at the lake.