I think its unfair to say Cyprus developers do this often.
Yes there are a handful of rogues out there just as there are in every country.
The majority of developers are reliable although completion dates do have a habit of being later than promised. Buyers should be aware that this is often a problem and make sure their solicitors have a late delivery clause written into the contract.
The other important thing is to withhold a proportion of the last payment until all snagging has been completed to satisfaction. Once the developer has your money they are not bothered about any problems you may have.
My husband and I sell property here in Cyprus and always advise our clients to to make sure these things are covered in their contracts. Other than these things we have found the developers we work with to be very good and very reliable